The element is a key ingredient in making the building blocks of life.
But all hope is not lost.
It looks like we'll just have to go take a look ourselves.
A new experiment has shown that life on Mars is possible.
Perhaps microbial life was building on Mars long before we were on this planet.
We may have narrowed the search for life on the Red Planet.
Could we have missed the signs?
Mars may not be a dead world after-all.
If 'oldest fossils ever' isn't exciting enough, how about possible prehistoric life on Mars?
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