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Animals

Tardigrades could teach us how to handle the rigors of space travel

Tardigrades can withstand X-rays, freezing and vacuum. Now researchers are learning how they do it, with an eye toward human space travel.

Health & Medicine

Two pig hearts were successfully transplanted into brain-dead people

The transplants kept the patients’ blood flowing for three days and are an early step in figuring out if the procedure might work in living people.

Environment

Flower shape and size impact bees’ chances of catching gut parasites

Bumblebees have higher chances of contracting a gut parasite from short, wide flowers than from blooms with other shapes, experiments show.