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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
Stargazing destinations: Alberta
Skywatchers! Check out this first video in the Chasing Darkness series, a stargazing destination guide. This episode - dark sky preserves in Alberta, Canada.
January 22, 2019
Easter Island monument mystery solved?
Researchers have long wondered why ancient people built the famous Easter Island monuments where they did.
January 20, 2019
Rotating black holes as portals for hyperspace travel
One of the most cherished science fiction scenarios is using a black hole as a portal to another dimension or time or universe. Is it possible? Maybe. But choose carefully. All black holes are not created equal.
January 15, 2019
The shrinking Aral Sea
The Aral Sea was once the world's 4th-largest lake. But in the 1960s, the Soviet Union diverted 2 major rivers to irrigate farmland, and the Aral Sea has been slowly disappearing ever since.
January 13, 2019
Black carbon from Gulf War shows up in Tibet glacier
A study traces black carbon from 1991 Kuwait oil fires to ice in northern Tibet. Researchers say this soot could affect glacier melt at the Tibetan plateau, considered the "Water Tower of Asia."
January 11, 2019
Sun’s entry into zodiac signs, 2019
Astrology and astronomy differ. In some systems of astrology, zodiac signs remain fixed relative to seasonal markers, such as the equinox and solstice points.
January 9, 2019
EarthSky’s most popular photos of 2018
Wow! Huge thanks to the EarthSky community for all the images you've contributed this year. Here are some of 2018's most popular photos.
December 28, 2018
Is time travel possible?
Sure it is, says this physicist, but only if you have an object with infinite mass. Here’s the story of how to build a time machine, with a design that's deceptively simple.
December 26, 2018
