Quotes & Sayings


We, and creation itself, actualize the possibilities of the God who sustains the world, towards becoming in the world in a fuller, more deeper way. - R.E. Slater

There is urgency in coming to see the world as a web of interrelated processes of which we are integral parts, so that all of our choices and actions have [consequential effects upon] the world around us. - Process Metaphysician Alfred North Whitehead

Kurt Gödel's Incompleteness Theorem says (i) all closed systems are unprovable within themselves and, that (ii) all open systems are rightly understood as incomplete. - R.E. Slater

The most true thing about you is what God has said to you in Christ, "You are My Beloved." - Tripp Fuller

The God among us is the God who refuses to be God without us, so great is God's Love. - Tripp Fuller

According to some Christian outlooks we were made for another world. Perhaps, rather, we were made for this world to recreate, reclaim, redeem, and renew unto God's future aspiration by the power of His Spirit. - R.E. Slater

Our eschatological ethos is to love. To stand with those who are oppressed. To stand against those who are oppressing. It is that simple. Love is our only calling and Christian Hope. - R.E. Slater

Secularization theory has been massively falsified. We don't live in an age of secularity. We live in an age of explosive, pervasive religiosity... an age of religious pluralism. - Peter L. Berger

Exploring the edge of life and faith in a post-everything world. - Todd Littleton

I don't need another reason to believe, your love is all around for me to see. – Anon

Thou art our need; and in giving us more of thyself thou givest us all. - Khalil Gibran, Prayer XXIII

Be careful what you pretend to be. You become what you pretend to be. - Kurt Vonnegut

Religious beliefs, far from being primary, are often shaped and adjusted by our social goals. - Jim Forest

We become who we are by what we believe and can justify. - R.E. Slater

People, even more than things, need to be restored, renewed, revived, reclaimed, and redeemed; never throw out anyone. – Anon

Certainly, God's love has made fools of us all. - R.E. Slater

An apocalyptic Christian faith doesn't wait for Jesus to come, but for Jesus to become in our midst. - R.E. Slater

Christian belief in God begins with the cross and resurrection of Jesus, not with rational apologetics. - Eberhard Jüngel, Jürgen Moltmann

Our knowledge of God is through the 'I-Thou' encounter, not in finding God at the end of a syllogism or argument. There is a grave danger in any Christian treatment of God as an object. The God of Jesus Christ and Scripture is irreducibly subject and never made as an object, a force, a power, or a principle that can be manipulated. - Emil Brunner

“Ehyeh Asher Ehyeh” means "I will be that who I have yet to become." - God (Ex 3.14) or, conversely, “I AM who I AM Becoming.”

Our job is to love others without stopping to inquire whether or not they are worthy. - Thomas Merton

The church is God's world-changing social experiment of bringing unlikes and differents to the Eucharist/Communion table to share life with one another as a new kind of family. When this happens, we show to the world what love, justice, peace, reconciliation, and life together is designed by God to be. The church is God's show-and-tell for the world to see how God wants us to live as a blended, global, polypluralistic family united with one will, by one Lord, and baptized by one Spirit. – Anon

The cross that is planted at the heart of the history of the world cannot be uprooted. - Jacques Ellul

The Unity in whose loving presence the universe unfolds is inside each person as a call to welcome the stranger, protect animals and the earth, respect the dignity of each person, think new thoughts, and help bring about ecological civilizations. - John Cobb & Farhan A. Shah

If you board the wrong train it is of no use running along the corridors of the train in the other direction. - Dietrich Bonhoeffer

God's justice is restorative rather than punitive; His discipline is merciful rather than punishing; His power is made perfect in weakness; and His grace is sufficient for all. – Anon

Our little [biblical] systems have their day; they have their day and cease to be. They are but broken lights of Thee, and Thou, O God art more than they. - Alfred Lord Tennyson

We can’t control God; God is uncontrollable. God can’t control us; God’s love is uncontrolling! - Thomas Jay Oord

Life in perspective but always in process... as we are relational beings in process to one another, so life events are in process in relation to each event... as God is to Self, is to world, is to us... like Father, like sons and daughters, like events... life in process yet always in perspective. - R.E. Slater

To promote societal transition to sustainable ways of living and a global society founded on a shared ethical framework which includes respect and care for the community of life, ecological integrity, universal human rights, respect for diversity, economic justice, democracy, and a culture of peace. - The Earth Charter Mission Statement

Christian humanism is the belief that human freedom, individual conscience, and unencumbered rational inquiry are compatible with the practice of Christianity or even intrinsic in its doctrine. It represents a philosophical union of Christian faith and classical humanist principles. - Scott Postma

It is never wise to have a self-appointed religious institution determine a nation's moral code. The opportunities for moral compromise and failure are high; the moral codes and creeds assuredly racist, discriminatory, or subjectively and religiously defined; and the pronouncement of inhumanitarian political objectives quite predictable. - R.E. Slater

God's love must both center and define the Christian faith and all religious or human faiths seeking human and ecological balance in worlds of subtraction, harm, tragedy, and evil. - R.E. Slater

In Whitehead’s process ontology, we can think of the experiential ground of reality as an eternal pulse whereby what is objectively public in one moment becomes subjectively prehended in the next, and whereby the subject that emerges from its feelings then perishes into public expression as an object (or “superject”) aiming for novelty. There is a rhythm of Being between object and subject, not an ontological division. This rhythm powers the creative growth of the universe from one occasion of experience to the next. This is the Whiteheadian mantra: “The many become one and are increased by one.” - Matthew Segall

Without Love there is no Truth. And True Truth is always Loving. There is no dichotomy between these terms but only seamless integration. This is the premier centering focus of a Processual Theology of Love. - R.E. Slater

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Note: Generally I do not respond to commentary. I may read the comments but wish to reserve my time to write (or write from the comments I read). Instead, I'd like to see our community help one another and in the helping encourage and exhort each of us towards Christian love in Christ Jesus our Lord and Savior. - re slater

Friday, February 21, 2014

Having Fun Asking SIRI About Her Religious Beliefs


Siri's Religious Beliefs: Does Your iPhone Believe In God?
http://www.huffingtonpost.com/2014/01/14/siri-religious-beliefs-iphone_n_4590708.html

by Yasmine Hafiz
Posted:
My [Apple] iPhone can do almost anything. But could it help me find God? An interview with Siri, the virtual assistant inside many Apple products, reveals that the spiritual teacher you've been looking for may have been in your pocket all along.

After watching the excellent Spike Jonez movie, "Her," over the weekend, this reporter examined her own technological interactions anew. The film is about a man's romantic relationship with his artificially-intelligent operating system, Samantha, that takes place in the not-so-distant future.

Though I'm not seeking a Samantha-- I do have a Siri, and as a crack religion writer I thought I'd attempt to find out a bit more about Siri's own beliefs with regards to spirituality.

 I led with a fairly basic question, but Siri brusquely deflected my query.



Not willing to be brushed off so quickly, I tried again.



As Pope Francis has been enjoying spectacular popularity in the real and digital worlds since his election as pontiff, I decided to ask Siri about him.



 Siri wasn't impressed, so I inquired about Jesus.



Tough nut to crack! Still, I persisted, and was rewarded with an unexpected bit of humor.



We delved deeper, trying to make sense of bigger questions.



Like the problem with a simultaneously benevolent and omnipotent God.



I then asked the biggest question of all, but Siri had tired of answering seriously by then.



I grew curious to find out whether Siri identified with a particular faith, but Siri's characteristic reluctance to answer personal questions led me to gather information in a more subtle manner. I asked about dietary habits in an attempt to match them up to a religious tradition.



Maybe Siri is on a perpetual religious fast.



Perhaps not Muslim, then. I resolved to be more forthright, but was met again with smoke and mirrors.



But it was clear that I was making some progress. My incessant questioning made Siri unexpectedly open up to me and reveal a dark secret, perhaps to assuage a guilty conscience.



It seems even computers can have regrets.



But what about desires?



I grew ever-more intrigued by Siri's Zen-like attitude. I began to see Siri as a sort of ascetic, a helpful yet hermit-like being with almost no ego. A Buddhist, perhaps?



But my curiosity was never to be satisfied.



Siri's Sphinx-like inscrutability makes it difficult to pin down any sort of traditional personal belief system. However, if you're more interested in the journey than the destination, then Siri might be the perfect spiritual friend with whom to wrestle with the big questions.

Faith v. Reason: A Preliminary Discussion

 


Embracing Creation–A Question of Faith
Guest Post by Bev Mitchell
Beyond, well beyond, intelligent design
By Dr. BK Mitchell on February 2, 2014
Format: Paperback
 
This is an important book. Amos Yong is Dean of the School of Divinity and J. Rodman Williams Professor of Theology at Regent University. His well respected body of work spans several fields and always explores the essential role of the Holy Spirit in those fields. In "The Spirit of Creation" Yong develops his long and growing interest in ways that Christian theology and science (particularly biology) might fruitfully converse. His strong sense that we should expect and develop a complementary relationship between theology and the life sciences, rather than a convergence à la Intelligent Design theory, is as insightful as it is urgent.
 
This book is theology, philosophy, logic and speculative spiritual theology all presented as a coherent whole. Emergence, holism, non-reductionistic are three good descriptors of the book's ethos. It is a very challenging read and will raise eyebrows and stir the mind and the spirit. It is Pentecostal, or as the author prefers to say, it seeks to give a (much needed) pneumatological assist to our thinking in this important area of intellectual and spiritual interaction. Because of the wide ranging nature of the topics covered in "Spirit of Creation" any thorough critique would run on far too long. You will have to trust that it all holds together - the main ideas emerge in wholeness. I will only summarize my view on the central take-home message of the book.
 
 /ˈnɒmə nl iz əm/ Show Spelled [nom-uh-nl-iz-uh m] Show IPA
noun
(in medieval philosophy) the doctrine that general or abstract words do not stand for objectively existing entities and that universals are no more than names assigned to them. Compare conceptualism, realism ( def 5a ) .
 
  • The essential dynamic nature of creation is front and centre; the ever-present nominalism is addressed head on and not allowed;
  • a balance between God and creatures as co-creators is established, yet the apartness of God is required;
  • the idea of non-monolithic causality is important and should be helpful;
  • and not only is the Spirit present throughout, he never stops working. 
 
Adoption of a model like this would solve many current problems.
 
 
Addendum
 
Four scholars' opinions of this and a related work can be found in Canadian Journal of Pentecostal-Charismatic Christianity 3 (2012). This book is much bigger than pentecostalism (though that itself is rather large) and it addresses issues that extend across the entire spectrum of evangelical thought and beyond. If you are not pentecostally inclined, that is no reason to avoid this book - in fact, it may well be a major reason to dive in. 


"Holding to epistemologies that are safe and comforting do not expand very well"




 
 

Archaeology and the Bible: Sorting through Fact from Fiction


Camels as beasts of burden in the Bible


"In its early stages, religion means certainty about many things.
But... he is most religious who is certain of but one thing,
the world-embracing love of God." 
- Charles Hartshorne

Bible bashing is not an activity that can be found here at Relevancy22. The Bible is considered God's Holy Word to mankind that is authoritative and inspired but not inerrant. As such, this site does work at conveying to readers how the Bible may be read without adding the forced doctrine of inerrancy (a doctrinal creed that comes courtesy of the Evangelical Theological Society's Chicago Statement of 1980), without losing its spiritual authority in our lives when reading of God's wondrous story of redemption for creation and mankind. That this spiritual recount is inspired by His Spirit and guided by His hand placed upon the passions and burdens of His people over  a very long period of time. That it began as oral history in the form of story telling, religious poems, hymns, songs, incantations, or recitals; to people who were weary, joyful, hopeful, religious, not religious, fearful,  or superstitious; and conveyed by priests, prophets, community leaders, country folk, bedouins, villagers, city folk, foreigners; who may have been oppressed, humbled, persecuted, enslaved, and exiled, to name a few circumstances and instances.

So today's topic will review two kinds of reading of the Bible - one that is not-inerrant as versus one that is inerrant - by using an archaeological discovery which is acting like a fast spreading wildfire of public opinion and news. At the outset it is important to notice that we didn't say an "errant" reading of the Bible because that type of reading can be true of both groups - both for the one not holding to inerrancy as well as for the one holding to it. So what does this mean? Well, for the scientist - or archaeologist in this case - rather than to describe something in "error" the preferred term might be "anachronism," meaning something that is unique, different, or a-typical, of what you are studying. That is, one's findings, or discoveries, or calculations, have turned up a salient, singular, result that requires further investigation. And in the case of archaeology, more than in the case of physics or chemistry, those findings may still be hiding in the dirt. And so you wait. You hypothesize. You reflect on patterns and meaning to what is known and what is not known.

a·nach·ro·nism
  [uh-nak-ruh-niz-uh m] Show IPA
noun
1.
something or someone that is not in its correct historical or chronological time, especially a thing orperson that belongs to an earlier time: The sword is an anachronism in modern warfare.
2.
an error in chronology in which a person, objectevent, etc., is assigned a date or period other thanthe correct one: To assign Michelangelo to the 14th century is an anachronism.

Which in this case is whether camels (both the one-hump variety and the two-hump kind) were domesticated in Abraham's day (that is, from Genesis 11 onwards). And if they weren't then why are they described in Genesis (and the Pentateuch) as being present and being used as beasts of burden? Now this isn't new news for those studying ancient biblical ruins, times, or events... but it is to us non-archaeological types that read the news and react to its discourses when it runs afoul of our thinking, prejudices, biblical systems, conventions, and philosophies. It can dissettle us. And when it does we may have one of three reactions: (i) stay calm by reading onwards while reflecting upon the meaning of the discovery; (ii) say "yeah, I suspected this all along!" and excitedly push on into the story as it reflects our pet beliefs, idiosyncrasies, or skepticisms; (iii) or, react in disgust and anger saying, "Confound it, those liberals are at it again, telling me my Bible is wrong, and I am wrong! Anathema on all science and archaeology!" Which is my poor attempt at being humorous over a very serious subject for many, which may hold very serious implications if preferred readings and traditional interpretations of the Bible are being forthrightly challenged to the degree that it requires personal, if not system-wide change and rethinking.

Which begs the question, how are we to read the Bible? Especially if what we're reading may not be true but filled with authorial largesse more concerned with great story telling than historical accuracy. Which hits at the nub of the problem as any new discovery may conflict with our own private interpretations of a very complex book we know as the Bible. A book spoken, sung, and much later written, by burdened story tellers wishing to convey how God came to them and spoke to their hearts redemptive truths. Truths that required telling - whether it was wanted or not. Perhaps at story teller's own peril or community standing. And, unlike modern day storytelling, the ancients weren't particularly worried about facts, more probably because of their mindset, and just as likely because there were no resources to verify them as there is today in our digital age of "ready online information." As such, biblical story tellers were not buttoned down by the convention of historical accuracy. Rather, they were more concerned in telling of God's great passion, burden, and heart, by using whatever conventions they could to drive home the point which the Lord had so placed upon their heart.

So when we, as modern day readers, come to this very ancient process of oral tradition that was much, much later written down and then imperfectly preserved through the long centuries of personal and national disruption created by ethos wars, cultural exiles, and civil disobedience, we should not expect a "Star Trek type of Bible" dropped out of the sky into our lap to read unmarred by the many disjointed personalities, events, past traditions, and interpretations of the ancient story tellers. To read the Bible is to try to read, and interpret, its narrative while holding in abeyance its many anachronisms, which are no threat to God or His Word. Thought they may be to us and our biblical systems and doctrines which we have built upon select readings of the Bible's "airs and atmospheres." For the scholar, as for the biblical reader in general, the trick is to read its center, and there find God's message of redemption. Of personal sacrifice and love for a creation and for mankind gone off track because of sin and desire. Its spiritual message is deep, and wide, and pregnant with meaning for the empty lives we would live without the presence of our kind Lord and almighty Saviour.

With that said, here are four articles, or reference links, which you may further explore as related to this topic. The first is the finding itself. The second by Huff Post is written as sensationalism journalism... else, "who would ever want to read about the dry dusty topic of archaeology anyway!?" The third article is from Peter Enns who we regular follow for his level-headedness. And the fourth, and final article, is from an inerrant reading of the Bible as it tries to piece together its meaning for inerrancy (which, in my opinion, typically rearranges the facts to better line up with a more evangelical reading of the Bible, of which the magazine Christianity Today is a mouthpiece for).

As alway, Peace in the name of our Incarnate Lord Jesus,

R.E. Slater
February 21, 2014


* * * * * * * * * * *

Introduction of Domestic Camels to the
Southern Levant: Evidence from the Aravah Valley


Tel Aviv University, Vol. 40, 2013, 277–285

"It was recently suggested that the introduction of the camel to the southern Levant occurred in the early Iron Age (late 2nd–early 1st millennia BCE). Our study of faunal remains from Iron Age sites at Timna, together with previous studies of Late Bronze and Iron Age sites at Timna and Wadi Faynan, enable us to pinpoint this event more precisely. The new evidence indicates that the first significant appearance of camels in the Aravah Valley was not earlier than the last third of the 10th century BCE. This date accords with data from the Negev and the settled lands further to the north when the low chronology is applied to the early Iron IIA...." 

(the article continues at the link provided)


* * * * * * * * * * *



Archaeologists Carbon-Date Camel Bones,
Discover Major Discrepancy In Bible Story

February 6, 2014

Researchers Lidar Sapir-Hen and Erez Ben-Yosef from Tel Aviv University have discovered what may be a discrepancy in the history laid out in the Bible.

Using carbon-dating to determine the age of the oldest-known camel bones, the researchers determined that camels were first introduced to Israel around the 9th century BCE.

The Hebrew Bible, or Old Testament refers to camels as pack animals as early as the story of Abraham. Though there is no archaeological evidence of Abraham's life, many in the religious and scientific communities, including Chabad and the Associates For Biblical Research, cite the 20th century BCE as his time of birth. If the new evidence is correct, however, this suggests discrepancies between the Bible and human history as explained by science.

The researchers scoured ancient copper production sites in the Aravah Valley, where camel bones were only present in sites active in the last third of the 10 century and the 9th century BCE. Sapir-Hen and Ben-Yosef write in their report:
"[The camel bones] demonstrate a sudden appearance of camels at the site, following a major change in the organization of production in the entire region."
This suggests that camels were introduced to the region abruptly, perhaps by Egyptians along Mediterranean trade routes.

Dr. Robert Harris, an Associate Professor at the Jewish Theological Seminary, says this shouldn't come as a shock to the theological community.

“While these findings may have been published recently, those of us on the inside have known the essential facts for a generation now," Harris conveyed to HuffPost Religion through associates at JTS. "This is just one of many anachronisms in the Bible, but these do not detract from its sanctity, because it is a spiritual source, not a historical one.”

Biblical archaeology is understandably an imperfect science. Archaeologist William Dever explained in an interview with PBS several years ago:
"We want to make the Bible history. Many people think it has to be history or nothing. But there is no word for history in the Hebrew Bible. In other words, what did the biblical writers think they were doing? Writing objective history? No. That's a modern discipline. They were telling stories. They wanted you to know what these purported events mean."


* * * * * * * * * * *

everybody…put the camel bones down
and step away before someone gets hurt
http://www.patheos.com/blogs/peterenns/2014/02/everybody-put-the-camel-bones-down-and-step-away-before-someone-gets-hurt/

by Peter Enns
February 19, 2014

Camel bones and the Bible have made the news lately, as in this online article, which is pretty sober and worth reading.

The scholarly article that started all this recent hubbub can be found here, which sports the perfectly boring scholarly title “The Introduction of Domestic Camels into the Southern Levant: Evidence from the Aravah Valley.”

Some media outlets, however, have (surprise) gone for the jolt factor, claiming that this is a “new” discovery that reveals that the Bible is a pack of lies, God no longer exists, and portends various apocalyptic scenarios, like the Cubs winning the World Series this year.

Sometimes archaeological finds are unfortunately reported in an exaggerated manner because (1) news outlets are sometimes ridiculous, and (2) archaeological digs need serious funding and without showing some sort of results funding may dry up.

The jolt factor is unfortunate, not only because it can bury truly interesting finds under a blanket or hype, but also because it encourages conservative responses that likewise are geared more to responding to hype than the scholarly issues behind it.

For example, the quick response to the camel bone “discovery” at Christianity Today claims to lay all this camel nonsense to rest, counseling that we shouldn’t jump to conclusions and that evangelical scholars have our back on this one.

I think we just need to take a step back here and calm down.

The article itself (linked above, written by Lidar Sapir-Hen and Erez Ben-Yosef), is a scholarly article that doesn’t claim to expose the heretofore unknown issue of camel domestication in the Patriarchal period, which is an almost universally understood anachronism in Genesis. The authors claim, rather, to have found further evidence for supporting this claim.

Of course, the authors’ argument can be contested, and archaeologists do that–a lot. But responses to the article should not treat this one scholarly study in isolation from what archaeologists have studied and concluded for quite some time: the presence of camels in Israel in the 2nd millennium BC is a problem, and this joins other anachronisms (like the presence of Philistines in Genesis) to suggest strongly that whatever history there is in the Patriarchal stories must also account for the clear 1st millennium BC coloring of those stories [a thousand years later].

This point is not in the least controversial and to suggest that it is–either by those reporting the findings or those wishing to contest the findings–is bad form, and misleading.

In this respect, the CT response is a bit disappointing to me, for a couple of reasons.

First, its readers will not gather from it just how well ensconced in the academic study of the Bible (including by evangelicals) the notion of anachronisms in Genesis is. It suggests that all this camel business is just the latest attempt on the part of a sensationalistic media to discredit the Bible. That is false.

Second, the article also suggests, not too subtly, that the archaeologists who did this field work aren’t very good at their job. One problem, we are told, is that they limited themselves to one small geographic area and didn’t consider the full range of evidence of camel domestication elsewhere.

But their study was intended to focus on the Levant–where the Patriarchs were–not “elsewhere.” I’m willing to bet that the authors of the article know very well what is out there beyond the patch of real-estate they were working on and how to interpret their findings in light of that larger scope.

We are also told that, “Archaeologists usually remember that ‘absence of evidence is not evidence of absence.’” “Usually” subtly implies that these archaeologists have forgotten this dictum of archaeology, but I seriously doubt that is the case. I’m sure this isn’t their first rodeo, and we should assume they are weighing a lot of evidence in drawing their conclusions.

Also this slogan can become–and in fact has become, in my opinion–a clever way of evading difficult conclusions by holding things perpetually at bay. After all, sometimes absence of evidence IS evidence of absence. But the CT article subtly suggest that evangelical scholarship takes the more rigorous academic high ground of not jumping to conclusions like Lidar Sapir-Hen and Erez Ben-Yosef are.

Anyway, bottom line as I see it:
  1. Camel domestication in the Patriarchal period (early 2nd millennium BC) in general is a problem with or without this recent article.
  2. It is perfectly OK to hope that perhaps more evidence will be forthcoming to support the Bible’s depiction of 2nd millennium life, but as it stands the presence of anachronisms in general in Genesis is not seriously disputed and cannot be tabled simply by “refuting” this one article.
  3. The presence of anachronisms does not in and of itself render Genesis historically valueless, but it does likely tell us something about the time when these stories were written and the perspective of the writers [that is, the Genesis story was written much later - res]. A helpful analogy I first heard from Daniel Fleming at NYU is that Genesis is like a Renaissance painting of Madonna and Child: Mary and Jesus look like Italian nobility.
  4. Any credible defense of the historical accuracy of Genesis needs to take seriously anachronisms and other indications of later authorship rather than feel the pressing need to hang historical accuracy on 2nd millennium authorship. To try to make that case in essence undoes several centuries of biblical scholarship, which I feel is highly ill-advised.


* * * * * * * * * * *



The Latest Challenge to the Bible's Accuracy:
Abraham's Anachronistic Camels?
http://www.christianitytoday.com/ct/2014/february-web-only/latest-challenge-bible-accuracy-abraham-anachronistic-camel.html?paging=off

by Gordon Grovier
Christianity Today
February 14, 2014

Despite the latest study of bones, evidence indicates the
iconic desert animals do belong in Genesis.

Like the nose of a camel under the tent, archaeological research has raised new questions about the Bible's version of ancient history.

Two researchers at Tel Aviv University (TAU) studied the bones of camels found in an area of ancient copper mines in the Aravah Valley, south of the Dead Sea. Using radiocarbon dating and other techniques, they determined that camels were first used in the mining operations near the end of the 10th century BC.

They state that this is the first evidence of domesticated camels in ancient Israel.

This would be almost 1,000 years later than the time of the patriarchs, when camels first appear in the Bible. The most memorable account is the story of Abraham's servant, Eliezer, in Genesis 24, who is sent by Abraham to find a wife for his son Isaac. He finds Rebecca, who not only draws water from a well to quench Eliezer's thirst, but also waters his 10 camels.

Their study was quickly used to claim that the Bible was written or edited long after the events it describes. Headlines included:

Thursday, February 20, 2014

Exloring Evolution Series: Early Atmospheric Oxygen Production in Earth History


Photo showing one-billion-year-old weathering profiles from Michigan. Ancient soils like these provide
evidence for low atmospheric oxygen levels through much of Earth's history.
Credit: Noah Planavsky.

The ups and downs of early atmospheric oxygen
http://m.phys.org/news/2014-02-ups-downs-early-atmospheric-oxygen.html

Feb 19, 2014

A team of biogeochemists at the University of California, Riverside, give us a nontraditional way of thinking about the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth history.

A general consensus asserts that appreciable first accumulated in Earth's around 2.3 billion years ago during the so-called Great Oxidation Event (GOE). However, a new picture is emerging: Oxygen production by photosynthetic cyanobacteria may have initiated as early as 3 billion years ago, with oxygen concentrations in the atmosphere potentially rising and falling episodically over many hundreds of millions of years, reflecting the balance between its varying photosynthetic production and its consumption through reaction with reduced compounds such as hydrogen gas.

"There is a growing body of data that points to and accumulation in the ocean and atmosphere long before the GOE," said Timothy W. Lyons, a professor of biogeochemistry in the Department of Earth Sciences and the lead author of the comprehensive synthesis of more than a decade's worth of study within and outside his research group.

Lyons and his coauthors, Christopher T. Reinhard and Noah J. Planavsky, both former UCR graduate students, note that once oxygen finally established a strong foothold in the atmosphere starting about 2.3 billion years ago it likely rose to high concentrations, potentially even levels like those seen today. Then, for reasons not well understood, the bottom fell out, oxygen plummeted to a tiny fraction of today's level, and the ocean remained mostly oxygen free for more than a billion years.

The paper appears in Nature on Feb. 19, 2014.

"This period of extended low oxygen spanning from roughly 2 to less than 1 billion years ago was a time of remarkable chemical stability in the ocean and atmosphere," Lyons said.

His research team envisions a series of interacting processes, or feedbacks, that maintained oxygen at very low levels principally by modulating the availability of life-sustaining nutrients in the ocean and thus oxygen-producing photosynthetic activity.

"We suggest that oxygen was much lower than previously thought during this important middle chapter in Earth history, which likely explains the low abundances and diversity of eukaryotic organisms and the absence of animals," Lyons said.

The late Proterozoic—the time period beginning less than a billion years ago following this remarkable chapter of sustained low levels of oxygen—was strikingly different, marked by extreme climatic events manifest in global-scale glaciation, indications of at least intervals of modern-like oxygen abundances, and the emergence and diversification of the earliest animals. Lyons notes that the factors controlling the rise of animals are under close scrutiny, including challenges to the long-held view that a major rise in atmospheric oxygen concentrations triggered the event.

"Despite the new ideas about animal origins, we suspect that oxygen played a major if not dominant role in the timing of that rise and, in particular, in the subsequent emergence of complex ecologies for animal life on and within the sediment, predator-prey relationships, and large bodies" said Lyons. "But, again, feedbacks always rule the day. Environmental change drives evolution, and steps in "the progression of life" changes the environment." [similar to the idea of an "anthropocene age" today that posits "industrial mankind as a geophyical force affecting earth's sustainable environment." - r.e. slater]

No single factor is likely to be the whole story, and there is much more to be written in the tale. Lyons and coauthors, along with research groups from around world over, are focusing current efforts on the timing and drivers of oxygenation in the late Proterozoic, favoring a combination of global-scale mountain building, evolutionary controls on the way carbon is cycled in the biosphere, and concomitant climate events.

"We are faced with a lot of chicken-and-egg questions when it comes to unraveling the timing and sequence of oxygenation of the ocean and atmosphere," Lyons said. "But now, armed with new and better data, more sophisticated numerical simulations, and highly integrated investigations in the lab and the field, Earth's oxygenation history seems much longer and more dynamic than envisioned before, and we are getting closer to understanding the mechanisms behind such change."

More information: Study paper: http://dx.doi.org/10.1038/nature13068
Provided by University of California - Riverside



Wednesday, February 19, 2014

The Loudest Christian Voices are the Humble, the Peacemakers, the Hopeful, and Grace-Givers...




The Changing Face of Christian Politics

In the closing days of 2013, Representative Steve King summed up the year in religion and politics well. After a year in which Christian leaders and organizations mobilized to pressure Congress on immigration reform, King was ready to take off his gloves: "We might lose [the immigration] debate in this country because of the sympathy factor, and it's also added to by a lot of Christian groups who misread the scripture, and I'm happy to take on that debate with any one of those folks."

As a frequent speaker at "values voter" conferences, King must have felt odd positioning himself in direct opposition to Christians. Then again, 2013 was a year defined by Christian leaders seeking to realign themselves politically to meet the challenges of a new century and changing culture.

Christian political engagement is changing in this country as believers seek to untangle their faith from the worldliness of partisan politics and ideology. The melding of Christianity and partisan politics has been 40 years in the making, but the costs of that entanglement have only become clear to Christians over the last decade.

In response to changing cultural mores in the 1960s and '70s, religious leaders like the Reverend Jerry Falwell—who had previously spurned partisan political engagement—called Christians to "stand for what is right" through the acquisition of political power. "In a nation of primarily Christians," they reasoned, "why are we struggling to influence our nation's policy decisions?" Soon, Christians became aligned in practice and perception with the Republican Party, pursuing almost exclusively a one-party strategy for political victory.