Not only was Mars once much more like Earth, with atmosphere, - TopicsExpress



          

Not only was Mars once much more like Earth, with atmosphere, surface water and warmer temperatures, but it had a potentially key ingredient for life that was not available on our home world. That buttresses a mind-bending theory that life got its start on Mars and then spread to Earth. Today, Mars is a cold dry desert with a thin atmosphere that provides little protection from deadly solar and cosmic radiation. But roll back the hands of time some 4 billion years and Mars had at least a polar ocean and abundant supplies of liquid water.
Posted on: Thu, 29 Aug 2013 06:07:29 +0000

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