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Why did passenger pigeons die out?
In the 19th century, passenger pigeons were so numerous that hunters competed to shoot as many as possible. But the last passenger pigeon died in the Cincinnati Zoo over 100 years ago. How did it all go so wrong?
January 18, 2018
Meteor lit up Michigan night skies
A brilliant fireball lit up skies in the U.S. state of Michigan Tuesday night and caused the equivalent of a magnitude 2.0 earthquake.
January 17, 2018
Is Arctic warming behind year’s crazy winter weather?
An atmospheric scientist who studies the Arctic explains why – because of global warming – the U.S. may be in for longer cold spells in the winter.
January 13, 2018
What was that bright flash over Russia?
A flash seen over a wide swath of Russia on January 7 at first caused fears of a U.S. air strike on North Korea. For now, the flash is unexplained.
January 10, 2018
Genetic research reveals secrets of extinct Tasmanian tigers
The most complete genome yet for a truly unique marsupial - the Tasmanian tiger - suggests that, if the tigers hadn't been hunted to extinction, they might still have struggled to survive.
January 9, 2018
NASA spacecraft spies electric-blue clouds over Antarctica
These noctilucent, or night-shining, clouds are seeded by debris from disintegrating meteors. They glow electric blue when they reflect sunlight.
January 7, 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
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
See it! High tides and winter storms
High tides followed Monday's supermoon, as Storm Eleanor plowed into Europe. Then a "bomb cyclone" hit the U.S. East Coast. Photos here showing winter's power and terrible beauty.
January 4, 2018
Ringing in 2018 with 85 new species
From sea slugs to sharks to flowering plants, spanning 5 continents and 3 oceans, these new discoveries add to Earth’s tree of life.
January 3, 2018
