Battle looms over renewed plastic treaty negotiations

Representatives from 175 nations meet in Nairobi from Monday to negotiate for the first time what concrete measures should be included in a binding global treaty to end plastic pollution.

Q&A: Is panda diplomacy over?

One of D.C.'s most famous families has officially left town. No, not the Obamas—the giant pandas at the National Zoo.

New microfossils suggest earlier rise in complex life

Microfossils from Western Australia may capture a jump in the complexity of life that coincided with the rise of oxygen in Earth's atmosphere and oceans, according to an international team of scientists.

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