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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.

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.

Best photos: Snowflakes

A lot of us have been cold and “snow-verwhelmed” recently, but – although we might be getting tired of snow – we’re never tired of snowflake pics from EarthSky friends!

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.

What is a sun pillar, or light pillar?

Sun pillars, or light pillars, are shafts of light extending from the sun or other bright light source. They’re caused by ice crystals drifting in Earth’s air.

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.

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.

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.

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.

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.