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Do animals dream?
Your dog or cat might look as if it's dreaming when its whiskers twitch and legs wiggle. But are animals really dreaming?
February 7, 2019
How old is Earth’s inner core?
A new study suggests Earth's inner core is only about 565 million years old - relatively young compared to the age of our 4.5-billion-year-old planet.
February 7, 2019
Weird winter water: Steaming lakes, thundersnow, slurpee waves
An atmospheric scientist explains why water can do some strange-looking things at very cold temperatures, and what's different about snowfalls on Mars.
February 6, 2019
Is this ancient moon rock from Earth?
An intriguing ancient rock found on the moon and brought back by the Apollo 14 mission may actually have originated from Earth, a new study says.
February 3, 2019
Stargazing destinations: Oregon
Here's the 2nd video in the Chasing Darkness series, a stargazing destination guide. This episode: Skies over Oregon's Cascade Mountains and Alvord Desert.
January 31, 2019
Polar vortex 2019 photos and videos
Here's a glimpse of what the bone-chilling conditions in the U.S. Midwest this week look like.
January 31, 2019
How polar vortex blasts are tied to global warming
How could global warming be bringing the life-threatening cold to the central US this week? Scientists don't have all the answers, but, they say, the jet stream is the link.
January 30, 2019
A few favorite snowflake photos
We asked last week at EarthSky Community Photos for your snowflake images, then sat back and were dazzled by the beautiful and amazing photos you posted!
January 28, 2019
New warning about Greenland ice melt
A new study suggests that Greenland ice is melting 4 times faster than in 2003. "We’re going to see faster and faster sea level rise for the foreseeable future," these scientists said.
January 28, 2019
Moon craters reveal Earth’s history
Most scientists believe the moon and Earth have been bombarded by meteorites at a constant rate for the past few billion years. New research suggests that - in the past 300 million years - it's been happening 2 to 3 times more frequently.
January 23, 2019
