NASA is recruiting astronauts

Want to be an astronaut? NASA is seeking explorers for future space missions. Here's what it takes and how to apply.

Saturday night’s mystery light not a UFO

People in Los Angeles and various states in the U.S. West saw the mysterious light. It was confirmed as a Naval missile test off the California coast.

Weather disasters linked to climate change

Thirty two groups of scientists in 20 countries analyzed 28 weather disasters in 2014 - and found half of them linked to human-caused climate change.

6.8-magnitude earthquake strikes Chile

Strong earthquake along coast of central Chile. Same approximate region as much more powerful quake, two months ago. No tsunami warning. No immediate reports of damage or injuries.

Antarctica’s ozone hole in 2015

The 2015 Antarctic ozone hole formed later than usual and had the fourth-largest area measured since the start of the satellite record in 1979.

Scientists to monitor skies for UFOs

UFODATA wants to make UFO studies a more rigorous science and deploy a global network of automated surveillance stations to watch for UFOs full-time.

Heat in Persian Gulf to turn deadly?

A study suggests that, by the late 21st century, temperatures in the Persian Gulf might routinely edge above a tipping point for human survival. Wealthy areas might be able to adapt, poorer areas less able, the authors say.

Update: 2015 TB145 likely a dead comet

Last week heralded as largest known asteroid to pass Earth until 2027. Swept within 1.3 times the moon's distance on October 31. Now thought to be a comet!

Watch spacewalk live October 28

Watch two NASA astronauts make their first spacewalk outside ISS today, beginning at 8:10 a.m. EDT (12:10 UTC) until about 2:40 p.m. EDT (18:10 UTC).

Ice cores confirm colossal solar storms

Evidence that Earth was hit by two solar storms - 10 times larger than those observed recently - 1,000 years ago. If they occurred today, they'd have devastating effects on power supplies, satellites and communications.