How bringing back lost species revives ecosystems

Scientists often study the grim impacts of losing wildlife to hunting, habitat destruction and climate change. But what happens when endangered animals are brought back from the brink?

Erupting Hawaii volcano spurs warning for people to prepare

Waves of orange, glowing lava and smoky ash belched and sputtered Monday from the world's largest active volcano in its first eruption in 38 years, and officials told people living on Hawaii's Big Island to be ready in the ...

Lines in the sand need redrawing to reach climate deal

As international climate talks in the Egyptian desert go into their final days, negotiators are trying to move key countries' lines in the sand on multiple issues, including compensation for climate disasters, phasing down ...

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