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Wow! Polar stratospheric clouds spotted across the UK
Polar stratospheric clouds - also called nacreous clouds or mother-of-pearl clouds - have been putting on a show this week. Check out these beautiful images.
December 22, 2023
Solstices and equinoxes in a video from space
See how sunlight falls on Earth's surface during the solstices and equinoxes, and get a better understanding of why Earth's tilt causes the seasons.
December 21, 2023
Rare bird is half-male, half-female. See the video
See the 1st video of a rare bird - a half-male, half-female honeycreeper - along with photos. And learn about this condition, called bilateral gynandromorphism.
December 20, 2023
Iceland volcano erupts! See a livestream here
After weeks of earthquakes, an Iceland volcano began erupting powerfully on December 18, 2023. It was a bigger eruption than volcanologists had predicted!
December 19, 2023
Birds with backpacks to help study Earth’s atmosphere
Birds with backpacks: a new study from NASA's 'Internet of Animals' shows that high-flying great frigatebirds can provide detailed sampling of the atmosphere.
December 17, 2023
Emperor penguins: A report from the Antarctic
EarthSky friend Eliot Herman took a trip to the Antarctic, where he had the opportunity to see emperor penguins. Read his report and enjoy his amazing images.
December 15, 2023
Oldest known wild bird, Wisdom, is back!
A beloved albatross named Wisdom is the world's oldest known wild bird. She's more than 70! And she just returned again to her winter nesting ground.
December 8, 2023
What’s a green flash and how can I see one?
Have you ever seen the green flash from a setting sun? Learn how to see one here, plus how they appear, and enjoy some great photos and watch a video!
December 7, 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?
December 6, 2023
Kelvin-Helmholtz clouds look like ocean waves
Kelvin-Helmholtz clouds - aka fluctus clouds - can sometimes look like ocean waves. Check out these photos of them!
December 3, 2023
