250 million is the new 40: Mammals may already be halfway done on Earth, study finds

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250 million is the new 40: Mammals may already be halfway done on Earth, study finds
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The future is always hard to predict, especially millions of years from now. But researchers found that a future supercontinent centered around the tropics may be tough for mammals to survive.

predicts that 250 million years from now, a supercontinent formed around the equator will be too hot for mammals to survive.A new study in the journalpredicts that 250 million years from now, a supercontinent formed around the equator will be too hot for mammals to survive.

The study puts mammals' end date at about 250 million years from now — roughly the same amount of time since mammals first appeared. The big one: a future supercontinent. Over Earth's history, continents have undergone a cycle of converging into supercontinents, then again dispersing into the separate continents as we see today. Predictions suggest the next cycle will bring together our current continents into a supercontinent, called Pangea Ultima, centered along the equator.

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