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Why pee is yellow and how that keeps us healthy

A recent study revealed that bilirubin reductase is why pee is yellow. Learn more about the discovery and why yellow can be a sign of good health.

Dave Adalian

January 14, 2024

When does Friday the 13th have a full moon? Next one is 2049

Want to see some dates when a Friday the 13th and a full moon fall on the same day? Here are past and future Friday the 13ths with full moons.

Editors of EarthSky

January 13, 2024

NASA to unveil the X-59, an experimental supersonic jet

The X-59 is designed to break the sound barrier without creating a super-loud sonic boom. You can see it on January 12, 2024.

Lia De La Cruz

January 12, 2024

5 solar eclipses that changed our view of the world

Throughout history, total solar eclipses have blazed a path for science. Learn more about 5 solar eclipses that changed our view of the world.

Andrew Osiow

January 9, 2024

Mighty earthquake rocks Japan. Coastal areas evacuated

Mighty earthquake rocks Japan! The earthquake measured magnitude 7.5 according to USGS. It struck Japan on Monday afternoon, local time, prompting strong tsunami warnings.

Deborah Byrd

January 1, 2024

How to photograph a solar eclipse, with Alan Dyer

Get tips on how to photograph a solar eclipse with author and astrophotographer Alan Dyer. Use these tips for the April 8, 2024, total solar eclipse.

Kelly Kizer Whitt

January 1, 2024

X-37B spaceplane launched atop SpaceX Falcon Heavy

The Space Force X-37B spaceplane launched Thursday, December 28, 2023. The reusable craft is carrying experiments and test equipment on its latest mission.

Dave Adalian

December 29, 2023

Will humpback whales train us to communicate with aliens?

SETI researchers are studying how humpback whales communicate. This may eventually help us communicate with non-human intelligence of an alien civilization.

EarthSky Voices

December 14, 2023

Einstein’s gravity and quantum mechanics united at last?

Modern physics is founded on 2 pillars: Einstein's gravity and quantum mechanics. But these 2 theories contradict each other. Does this theory reconcile them?

EarthSky Voices

December 6, 2023