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Editors of EarthSky

Do elephants make alarm call that means ‘humans!’?

A new study suggests that elephants make a specific rumble in response to the danger of humans that's distinct from calls warning of bees or other threats.

First direct evidence of cosmic inflation

Astrophysicists say this work offers new insights into some of our most basic questions: Why do we exist? How did the universe begin?

Space rainbow: Glory seen in Venus atmosphere

For the first time, a spacecraft has imaged a rainbow-like feature known as a ‘glory’ on another planet.

This rough diamond hints at oceans’ worth of water inside Earth

A $20 diamond provides evidence of a 'wet zone' deep below Earth's surface where vast volumes of water are locked up inside minerals.

This tiny creature is called a tardigrade

Tardigrades are microscopic animals. They can go into a state of suspended animation and survive a long time without water or oxygen, even in the vacuum of space.

Largest yellow star yet discovered

Scientists say the hypergiant yellow star is absolutely huge, one of the ten largest stars found so far. It's 1,300 times the diameter of the sun and about a million times brighter.

Death stars in Orion blast planets before they even form

Young stars in the Orion Nebula get their potential planet-forming dust and gas blasted away if they're near enough to 'death stars' - massive O-type stars that emit fierce ultraviolet radiation.

A telescope bigger than a galaxy

Astronomers have figured out how to use the gravity of distant galaxies to bend light and magnify images, forming gigantic telescopes that see deeper into the cosmos than ever before.

Watch a near-Earth asteroid online Sunday night

Asteroid 2014 CU13 will pass about 8 lunar distances (2 million miles or 3 million km) away. Both the Virtual Telescope Project and Slooh will be broadcasting.

A river of plasma guards us from solar storms

MIT scientists identify a plasma plume that naturally protects the Earth against high-energy solar activity.