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'Ominous milestone for the planet': Arctic Ocean's 1st ice-free day could be just 3 years away, alarming study finds
By Ben Turner published
The Arctic's ice cover could dip below a crucial threshold as soon as 2027, and will do so inevitably in the next 20 years if greenhouse gas emissions continue, scientists warn.
Comets probably delivered Earth its water billions of years ago, new study reveals
By Conor Feehly published
Scientists have gathered new evidence to suggest icy comets indeed brought water to Earth, long ago.
Satellites find likely cause of mysterious African elephant deaths of 2020
By Sharmila Kuthunur published
Climate extremes seem to have exacerbated toxins in the elephants' water supply.
Cosmic rays could help assess hidden war damage in Ukraine
By Tereza Pultarova published
Energetic particles that arise when cosmic rays hit Earth’s atmosphere could help assess hidden damage to buildings in Ukraine after the war.
Strange "quasi-moon" of Earth will get one of these 7 names
By Mike Wall published
A panel of experts has picked seven finalists for the name of asteroid (164207) 2004 GU9, a "quasi-moon" of Earth. You can vote for your favorite through Jan. 1, 2025.
Declassified spy satellite images reveal 1,400-year-old battle site in Iraq that set off the Muslim conquest
By Sierra Bouchér published
Historical texts that mentioned details about the battle site helped researchers match the images to the lost town of al-Qadisiyyah.
This spot will be key to the inevitable collapse of a key Atlantic current
By Sascha Pare published
New modeling research reveals that the Atlantic Meridional Overturning Circulation (AMOC) is particularly vulnerable to shifts in the Irminger sea off Greenland from increasing Arctic meltwater.
'We didn't know what it was at first.' NASA aircraft uncovers site of secret Cold War nuclear missile tunnels under Greenland ice sheet
By Brett Tingley published
NASA scientists conducting surveys of arctic ice sheets in Greenland got an unprecedented view of an abandoned "city under the ice" built by the U.S. military during the Cold War.
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