Betelgeuse has dimmed recently, prompting some to wonder if it's about to explode. An explosion might trigger a gravitational wave burst. Betelgeuse is still there. The nearby gravitational wave burst probably means nothing for this star. Still ... 

The scientists call them "xenobots." They are tiny living robots assembled from the cells of frogs. Their creators promise advances from drug delivery to toxic waste clean-up.

NOAA reports that 2019 was the 5th consecutive year in which the United States experienced 10 or more $1 billion weather and climate disasters, including fires, hurricanes and flooding.

The pace of archaeological discoveries has picked up in recent decades, helping to refine the human story.

USGS reports that the strong earthquake in Puerto Rico this morning was "widely felt." Strong to very strong shaking occurred across parts of southern Puerto Rico closest to the event, and moderate shaking occurred across the rest of the island.

New research shows that Homo erectus, an ancestor of human beings, lived as recently as 108,000 to 117,000 years ago in Ngandong, on the Indonesian island of Java.

From the 1st landing on the moon's far side to the 1st actual image of a black hole, here’s a quick roundup of 9 of the stories our readers enjoyed most in 2019.

Wow! This was a tough choice. Thank you to all who submitted photos in 2019! Here are a few of our favorites.

"Anybody besides me notice that the past two decades have been nameless?"

Hundreds of thousands of people from 112 countries helped select names for distant exoplanets and their stars. So, for example, the exoplanet formerly known as HAT-P-36b - about 1,000 light-years away - now also carries the name Bran, from an Irish legend.