Our ancestor's ability to survive the mass extinction event that wiped out the dinosaurs could have important medical applications that one day could help a manned trip to Mars.
Only six of the creatures left, having been hunted by poachers in central and east Africa for their horns.
A survey of more than 3,000 vertebrate species reveals the damage caused by a near doubling of the human population.
The meteorite that killed off the dinosaurs 66 million years took a toll on evergreen trees.
State media reports that none of the rare fish were detected reproducing naturally in the polluted and crowded Yangtze river last year.
Thanks to humans, sharks are disappearing from our waters at an alarming rate. Is there any way to reverse things for these fierce, fascinating creatures of the deep?
Some scientists are arguing that humans today are wiping out animal species at a rate that matches up with past mass die-offs. Is the end nigh? Laci Green has the details.
Foot bones more than 40 million years old, from Antarctica, reveal a creature standing more than 6 and a half feet tall.
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