Testing the myth
Ninety-five million years ago, in what is now southeastern Morocco, giant predators ruled the land known today as the Kem Kem fossil beds
Animals as common as goats, deer, rabbits or mice can have a devastating effect on other wildlife
In 2007, scientists from the USGS said that if humans didn't cut greenhouse gas emissions, two-thirds of the world's polar bears could be gone by 2050
Humans have searched for extraterrestrial life for more than a century. What will we do when we find it?
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