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Help astrobiologist find extreme rocks

A scientist launches a hunt for earthly extraterrestrials. Help her find them!

Venezuela is losing its last glacier

Venezuela’s last glacier is about to disappear, making it the first country in modern history to lose all of its glaciers.

Video: Our living planet from space

“That’s the Earth, breathing every single day, changing with the seasons, responding to the sun, to the changing winds, ocean currents and temperatures.”

Scientists warn: Soon it will be too late to save Earth

More than 15,000 scientists in 184 countries have signed a letter urging the world to address major environmental concerns. “Soon it will be too late to shift course away from our failing trajectory, and time is running out.”

How tiger sharks are helping seagrass

A heatwave in 2011 killed off seagrass beds in Shark Bay, Australia. Now, scientists have discovered that tiger sharks are helping the ecosystem recover.

A depiction of the small rat-like mammals, that lived 145 million years ago, believed to be the earliest known ancestors of most modern mammals, including humans. Image courtesy of Dr Mark Witton, palaeo-artist, University of Portsmouth.

Scientists find teeth of early human ancestor

A remarkable find of fossil teeth from tiny, furry-tailed creatures – thought by scientists to be a human ancestor – dating back 145 million years.

Will 15 days of darkness start November 15? Nah

Are you ready for 15 days of darkness, November 15-30? No need to be. It’s a hoax.

When mammals switched from nights to days

Mammals once were night creatures. A new study suggests they became active in daylight after the dinosaurs went extinct, 66 million years ago.

Cloud shadow mystery … solved?

We published a photo last Tuesday, showing a mountain’s shadow. We wondered what caused it. Now – with the help of the EarthSky community – the mystery may be solved.

What makes zombie ants obey

Zombie ant fungus doesn’t attack ants’ brains. Instead, the fungus invades an ant’s entire body, forming an interconnected 3-D network, forcing the ant to move.

A Carolina chickadee with a juicy caterpillar. Photo courtesy of Desiree Narango and Doug Tallamy.

Want birds in your yard? Plant native trees

A recently published study confirms that native trees are most effective in hosting caterpillars, an important food for birds.

Why trees shed their leaves

Something to think about while raking.

2016 greenhouse gases at record high

As climate talks open in Bonn, Germany this week, negotiators are considering a report from the World Meteorological Organization, urging action now.

2017 ozone hole smallest since 1988

This year’s ozone hole peaked in September at its smallest observed extent since 1988, due to an unstable and unusually warm Antarctic vortex in 2017.

Twin Yellowstone super-eruptions altered global climate

The Yellowstone supervolcano’s last eruption wasn’t a single event, but 2 closely-spaced eruptions that put the brakes on a natural global-warming trend, says a study.

Deep-sea nightmares and other ocean spookiness

Eerie denizens of the ocean depths star in this video from the Monterey Bay Aquarium Research Institute.

Smokey sunset skies over Italy

These swirling, intense red sunset skies are due to ongoing wildfires in northern Italy.

Blue jets, red sprites and other flashes

In recent years, the International Space Station has given astronauts the chance to photograph transient luminous events – or TLEs – natural light shows produced at the tops of thunderstorms.

How cold and wet this winter in the US?

La Niña (or not) is the biggest wildcard in how this year’s winter might shape up. Overall, NOAA’s outlook suggests a relatively cool, wet U.S. North – and warm, dry U.S. South – this winter.

Alligators eat sharks

Jaws beware! Alligators might be coming for you, according to new research.