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Multiple cosmic impacts 790,000 years ago
Geoscientists reached this conclusion after dating glassy stones called tektites from various parts of the world.
February 25, 2016
Largest fireball since Chelyabinsk falls over Atlantic
The biggest fireball since the Chelyabinsk explosion plunged through the atmosphere over the Atlantic Ocean on February 6.
February 24, 2016
El Niño prolonging record coral bleaching event
This year's intense El Niño - added to our warming climate - is prolonging what's already the longest global coral die-off on record, according to scientists.
February 24, 2016
Extinction of giant herbivores changed global landscapes
Extinctions of large herbivores such as mammoths, mastodons, and ground sloths helped turn many open landscapes into forests, scientists say.
February 23, 2016
Ancient flowers probably poisonous
Two fossil flowers, found perfectly preserved in amber, came from an asterid group that ultimately gave rise to some of the world’s most famous poisons.
February 22, 2016
Category 5 Cyclone Winston slams Fiji
The strongest tropical cyclone recorded so far in 2016 - and Fiji's strongest tropical cyclone ever - made landfall Saturday evening.
February 20, 2016
Plastics in ocean harm oysters
Ground-breaking data on a negative effect on oysters from microplastics, which enter our oceans via cosmetics, clothing, and industrial processes.
February 18, 2016
Giant flightless bird roamed Arctic 50 million years ago
A bird bigger than Big Bird wandered through the winter twilight of the high Arctic some 53 million years ago.
February 18, 2016
The Blob is dead, scientists declare
The giant patch of warm water in the northern Pacific - nicknamed The Blob - has finally broken up. Compare images from this year and last.
February 17, 2016
New chick for oldest known wild bird Wisdom
Wisdom, a Laysan albatross, is at least 65 years old. Her latest chick hatched at the Midway Atoll National Wildlife Refuge on February 1.
February 17, 2016
