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Largest known prime number discovered
The new prime number, discovered by a collaborative computer project, is nearly one million digits larger than the previous record prime number.
January 9, 2018
Ocean plastic killing marine turtles
Hundreds of marine turtles die every year after getting tangled in trash - such as plastic ‘six pack’ holders and discarded fishing gear - in oceans and on beaches.
January 7, 2018
Scientists unearth 1st direct evidence of 1st Americans
Genetic analysis of DNA of an infant found at an Alaskan archaeological site is evidence of a previously unknown population of ancient people in North America.
January 6, 2018
How deep is your snow?
It’s really hard to measure snowfall accurately. The National Weather Service relies on more than 8,000 volunteers with rulers.
January 5, 2018
2018’s New Year’s supermoon
It was a great way to start 2018! The year started with a full moon that happened also to be the year's closest and brightest supermoon.
January 2, 2018
Top 7 EarthSky galleries of 2017
EarthSky sends out a year's worth of thank yous to our friends from around the world who shared images with us throughout the year. Please keep sharing in 2018!
December 30, 2017
Top 7 EarthSky stories of 2017
Here are 7 of the most-viewed news and feature stories of this past year.
December 29, 2017
Scientists expect 1st direct black hole image soon
This was the most popular post at EarthSky this week, and no wonder. It's exciting! Scientists expect the 1st-ever direct image of a black hole's event horizon, soon.
December 28, 2017
Sorry cat-lovers: New study says dogs are smarter
The study - from a self-confessed dog lover - counted cells in animals' brains associated with thinking, planning and complex behavior.
December 28, 2017
