BlogArena

General blog about anything and everything of everyday's life.

16. Dec 2019

May 28, 2015
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Ancient rocks show life could have flourished on Earth 3.2 billion years ago

A spark from a lightning bolt, interstellar dust, or a subsea volcano could have triggered the very first life on Earth. But what happened next? Life can exist without oxygen, but without plentiful nitrogen to build genes – essential to … Continue reading

April 17, 2014
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New Study Outlines ‘Water World’ Theory of Life’s Origins

Life took root more than four billion years ago on our nascent Earth, a wetter and harsher place than now, bathed in sizzling ultraviolet rays. What started out as simple cells ultimately transformed into slime molds, frogs, elephants, humans and … Continue reading

December 9, 2013
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Ancient Minerals: Which Gave Rise to Life?

Washington, D.C.— Life originated as a result of natural processes that exploited early Earth’s raw materials. Scientific models of life’s origins almost always look to minerals for such essential tasks as the synthesis of life’s molecular building blocks or the … Continue reading

September 26, 2012
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Large Bacterial Population Colonized Land 2.75 Billion Years Ago

There is evidence that some microbial life had migrated from the Earth’s oceans to land by 2.75 billion years ago, though many scientists believe such land-based life was limited because the ozone layer that shields against ultraviolet radiation did not … Continue reading

January 8, 2011
by Guest Post
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Widespread Ancient Ocean “Dead Zones” Challenged Early Life

*Persistent lack of oxygen in Earth’s oceans affected animal evolution* The oceans became oxygen-rich as they are today about 600 million years ago, during Earth’s Late Ediacaran Period. Before that, most scientists believed until recently, the ancient oceans were relatively … Continue reading