Lives and deaths of sibling stars

This beautiful star cluster, NGC 3293, is found 8000 light-years from Earth in the constellation of Carina (The Keel). This cluster was first spotted by the French astronomer Nicolas-Louis de Lacaille in ...

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Where have all the swallows gone?

Extinction: the permanent loss of a species. It is deeply troubling—and scientists and birdwatchers are ringing the alarm about a bird species that only a few decades ago was widespread and very common.

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