Research led by the University of Auckland has cast light on the evolutionary origins of one of nature's first motors, which developed 3.5 billion to 4 billion years ago to propel bacteria. Scientists ...

Earth’s earliest microbes may have built vital chemistry around molybdenum, a metal thought too scarce to matter in ancient oceans. By tracing genes across life, researchers now argue those organisms ...

In the oceans and on land, scientists are discovering rare, transitional organisms that bridge the gap between Earth’s simplest cells and today’s complex ones. By Carl Zimmer A flurry of new studies ...

Add Yahoo as a preferred source to see more of our stories on Google. A new study reveals that life on early Earth depended on molybdenum and tungsten billions of years before oxygen filled the ...