Watch 2 NASA astronauts aboard the International Space Station (ISS) make history by performing the 1st ever all-female spacewalk on Friday.

Lenticular cloud over Butte, Montana.

Glaciers are melting in many places on Earth today. But glacier loss in the Peruvian Andes is happening particularly rapidly. New research reports a reduction of almost 30% between 2000 and 2016.

Research involving a non-invasive scan of living human embryos shows that some muscles, thought to have been abandoned by our mammalian ancestors 250 million years ago, are still present before birth. They're among the oldest, albeit fleeting, remnants of evolution yet seen in humans.

A new study suggests that about 4,000 years ago, a combination of isolation, extreme weather, and the arrival of humans on Wrangel Island in the Arctic Ocean killed off Earth's last population of mammoths.

Astronomers have found 20 new moons orbiting Saturn, bringing the planet's total number of moons to 82. That surpasses Jupiter, which has 79.

Northern lights over Jämtland, Sweden.

"Nature's green magic over Sweden," said photographer Jörgen Norrland Andersson, who captured this image on September 27, 2019 Thank you Jörgen!

Alex Ustick captured the launch of Minuteman III - an unarmed test missile - from Vandenberg Air Force Base in Lompoc, California.

Here are some of the noises picked up by NASA’s Insight spacecraft since it landed on Mars almost a year ago.