Since 1999, Earth Observatory has published 16,000+ images. To celebrate our 20th anniversary and the 50th anniversary of Earth Day, we want you to pick our all-time best image. Each week from March ...

It’s probably not surprising that someone so at home in the snow—she learned to ski before she started school—would eventually wind up where Lora Koenig did this winter. Still, some people might ...

Satellite images of Earth at night have been a curiosity for the public and a tool of fundamental research for at least 25 years. They have provided a broad, beautiful picture, showing how humans have ...

NASA satellites and sensors constantly take the pulse of our planet, measuring how Earth changes by the day, season, year, and decade. Researchers and resource managers analyze those measurements and ...

It was the summer of 1990 and broiling hot in southwest Oman. The small group spread out their sleeping bags on a desert mesa, under the setting Sun. They had not planned on stopping here for the ...

The U.S. National Park Service celebrated its centennial in 2016, commemorating 100 years of stewardship of America’s natural and historic treasures. Many of those monuments, scenic rivers, parks, and ...