A swarm of grapefruit-size robots is taking to the seas.
Over the years, the otherwise serious ceremony of swearing in the president has had a few odd moments.
The night after the winter solstice, the skies over northern Canada were alight with the aurora borealis.
2016 had some very depressing headlines regarding global warming and the planet's overall environmental health.
About one-quarter of the world's population lives in coastal areas that will be unlivable by the year 2100 because of rising sea levels, researchers say.
The Cold War may have ended decades ago, but spy satellites' data from that era are now being used for a new mission: tracking environmental change in the Himalayas.
Though they appear to be frozen giants, glaciers and ice sheets can move and change in unexpected ways over time.