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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.

Deborah Byrd

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.

EarthSky Voices

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.

Deborah Byrd

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.

Editors of EarthSky

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.

EarthSky Voices

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.

Deborah Byrd

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.

Eleanor Imster

January 3, 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!

Eleanor Imster

December 30, 2017