Scientists say they've solved the geologic mystery of the Nile River’s unchanging path, and also discovered the river is about 30 million years old - 6 times older than previously believed.

Using a spray bottle to simulate rain, researchers found a "panic-like" response in plants. Complex chemical warning signals were passed from leaf to leaf and even communicated to other plants.

At this time of year, for all of us around the globe, the Pleiades star cluster culminates - reaches its highest point in the sky - around midnight.

Get up before dawn to see the moon near Regulus, the brightest star in the constellation Leo the Lion, on November 19 and 20, 2019.

Scientists are still trying to figure out where Mars' methane comes from. Now there's a new mystery that might be connected: unusual fluctuations of oxygen in Mars' atmosphere, detected by the Curiosity rover.

Astronomers have spotted a star - S5-HVs1 - speeding out of the Milky Way at around 4 million miles (more than 6 million km) per hour. They believe it's being ejected from our galaxy after venturing too near the giant black hole at the Milky Way's heart about 5 million years ago.

SpaceX's Starlink satellite project will eventually place an initial 12,000 satellites in low-Earth orbit to provide worldwide internet access. This image is from the second batch of satellites launched November 11.

Observatories are great places to view and photograph the night sky. Tips from an astrophotographer's trip to the Very Large Array in New Mexico - to help you plan your next astrophotography adventure - plus awesome photos.

November aurora over Iceland.

Click in to learn how to watch 2 International Space Station astronauts perform the 1st in a series of spacewalks NASA is calling "the most complex in a decade."