Asteroids help scientists measure distant stars

Look up at the sky on a clear night, and you'll see lots of stars. Sometimes they seem almost within reach or at least a short rocket ride. But the closest star to Earth—not counting our sun—is more than four light years ...

Study sheds light on social drivers of animal dispersal

Why would male and female animals choose different reproductive strategies? For golden lion tamarins in the Brazilian rain forest, the answer may offer clues to help save this neotropical primate.

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