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This is Scientific Americans 60 Second Science.

I'm Karen Hopkins. Got a minute?

Picture a brave fireman carrying a pet from a burning building.

Now, imagine that global warming is the burning building, a cherry tree is the pet, and a bear is the fireman.

You've now got the gist of a new study that finds that cherry trees may be able to survive rising temperatures thanks to mountain climbing bears that carry the cherry tree seeds

to cooler climbs. It's projected that over the next hundred years, temperatures on

earth could rise an average of nearly five degrees Celsius. While some animals might be able to

migrate north to escape the brunt of the heat,

plants can't uproot themselves quite so easily. But researchers wondered whether the creatures

that disperse plant seeds might be able to help. So scientists spent three years sifting through the

droppings of Asiatic bears looking for cherry tree seeds. And they found that the bears were

indeed transporting the seeds to cooler locations, not by moving to higher latitudes, but higher

altitudes. Seems the bears snack on the fruits that are found at the foot of the mountain

in spring, and then make the climb to higher elevations to enjoy young leaves and buds and

flowers, particularly as

the season progresses. The researchers could tell that seeds had been deposited higher up the

mountain than they'd been harvested by the ratio of their oxygen isotopes, which changes with

...