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A plate of Enterobacter aerogenes showing the bulls-eye pattern of swarming underneath a stylized clock face. Image via Jiffin Paulose.

The circadian clock in your gut

Our internal circadian clock tells our body when to sleep, wake and eat. New research says that bacteria living in our gut also have their own circadian clocks.

Camp Century doubled as a top-secret site for testing the feasibility of deploying nuclear missiles from the Arctic during the Cold War.

Ice melt may release Cold War-era toxins

Formerly secret Camp Century in Greenland was abandoned beneath ice and snow. But the ice is melting, and biological, chemical and nuclear waste may be released as early as 2090.

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Today in science: 7 minutes of terror

To celebrate the 4-year anniversary of Curiosity rover’s arrival on Mars, here’s a video on the final 7 minutes of its chilling descent on August 5-6, 2012.

Image via Sarah2 / shutterstock / theconversation

Parakeet takeover ahead?

“Parakeets are Britain’s fastest growing bird population and are on a trajectory to global domination.”

Geminid meteor in 2012 by Henry Shaw.

Learn to shoot photos of meteors

Want to try to capture a meteor on film? The first step is planning. The next step is to gather your equipment. Then on to the capture process itself.

Artist's concept of Emirates Mars Mission

Emirates Mars Mission to launch in 2020

The Emirates Mars Mission – which carries the name Hope – will become the first-ever mission to the Red Planet by any Arab country.

rocket-body-reentry-7-27-2016-ian-norman

Spectacular rocket reentry over US West

Observers in the U.S. West saw a disintegrating meteor – a fireball, or extremely bright meteor – on July 27, 2016. It was the reentry of a Chinese rocket body.

A housing complex in Thailand with air conditioners. Image via Chaiwat Subprasom/Reuters

Air conditioning’s big global impact

Higher global temperatures combined with higher global incomes mean more air conditioners. But what do more air conditioners mean?

An experimental rocket test over Scandinavia in 2009, which triggered many UFO reports. Read more about this photo.

If it’s not a UFO, what is it?

Most Unidentified Flying Objects aren’t unidentified at all. Here’s a list of natural and human-made objects in the sky that people frequently mistake for UFOs.

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Moon shadow in 2017 eclipse

Fly along with Earth’s shadow in a video depicting the path of the August 21, 2017 total eclipse of the sun, first eclipse over the continental U.S. since 1979.