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A lot has changed in the world since the Endangered Species Act (ESA) was enacted 50 years ago in December 1973.

Standing in an aspen grove, surrounded by slender white trunks and a canopy of leaves that rustle in the slightest breeze, it’s easy to think only of the trees.

A new snapshot of an ancient, far-off galaxy could help scientists understand how it formed and the origins of our own Milky Way.  

Positive tipping points must be triggered if we are to avoid the severe consequences of damaging Earth system tipping points, researchers say.

Insect decline is being driven by losses among the locally more common species, according to a new study published in Nature.