Subscribe
Subscribe
MY AMERICAN SCIENTIST
LOG IN! REGISTER!
SEARCH
 
Logo IMG
HOME > MULTIMEDIA > Multimedia Detail

SCIENCE IN THE NEWS DAILY

Did Life's First Cells Evolve in Geothermal Pools?

from Scientific American

Earth started as a violent place, its surface churned by continuous volcanic eruptions and cloaked in an atmosphere that would have been poisonous to today's life-forms. Furthermore, the thin primeval atmosphere may have provided only scant protection from the young sun's harsh ultraviolet glare. Given these inhospitable conditions, scientists have long wondered: How did the first cells come to be nearly four billion years ago?

Conventional scientific wisdom holds that life arose in the sea. But a new study suggests that the first cells--or at least the ones that left descendants still extant--got their start in geothermal pools, like those seen at Yellowstone National Park and other geologic hot spots today.

The argument rests on one indisputable observation--enzymes common to all archaea and bacteria are built from potassium, phosphorus or zinc, not sodium.

Read more...


comments powered by Disqus
 

Connect With Us:

Facebook Icon Sm Twitter Icon Google+ Icon Pinterest Icon RSS Feed

Latest Multimedia

EmlenBookCover

VIDEO: From Biology to Military History: Patterns in Animal Weaponry

What are the parallels between an ancient war ship and a dung beetle? More than you would think, actually! Douglas J. Emlen, PhD, has a unique perspective on animal weaponry that looks at patterns in military history.

To view all multimedia content, click "Latest Multimedia"!



RSS Feed Subscription

Receive notification when new content is posted from the entire website, or choose from the customized feeds available.


EMAIL TO A FRIEND :

Of Possible Interest

Science in the News Weekly: 'Open Tree of Life' to Include All Known Species

Science in the News Weekly: Science at the Top of the News for June 4-8

Science In The News Daily: Tree of Life Project Aims for Every Twig and Leaf

Subscribe to American Scientist