Majestic, increasingly hungry and at risk of disappearing, the polar bear is dependent on something melting away on our warming planet: sea ice.

Pompeii archaeologists said Saturday they have unearthed the remains of a "slave room" in an exceptionally rare find at a Roman villa destroyed by Mount Vesuvius' eruption nearly 2,000 years ago.

While conducting research in Greenland, ice scientist Twila Moon was struck this summer by what climate change has doomed Earth to lose and what could still be saved.

Four astronauts are scheduled to return to Earth from the International Space Station early Monday after spending more than six months in space, NASA announced.

Two hyenas at the Denver Zoo have tested positive for the coronavirus, the first confirmed cases among the animals worldwide, a national veterinary lab announced Friday.

Heavy rain caused severe flash flooding in Bosnia, prompting evacuations, causing power outages in most of the capital, closing a key facility for oxygen used for COVID-19 patients and submerging roads in some parts of the Balkan country on Friday.