Life on Earth began to appear at least 3.5 billion years ago; by then, Mars had already lost much of its water into the crust or outer space. Kevin M. Gill via Flickr under CC BY 2.0 The Martian ...
South Africa is home to some of the oldest evidence of life on Earth, contained in rocky, often layered outcroppings called ...
Along the coast of South Africa, strange rocky formations quietly grow in places where life seems unlikely to survive. These ...
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