Enjoying EarthSky? Subscribe.

273,050 subscribers and counting ...

Summer solstice at Stonehenge

Why do people gather at Stonehenge in England on the solstice? Info and photos here.

More wildlife now working the night shift

It’s getting harder for wild animals to find human-free spaces on Earth. New research suggests that human disturbance is creating a more nocturnal natural world.

Kilauea volcano lava river flows to sea

Kilauea volcano’s Fissure 8 has produced a large, channelized lava flow that’s acted like a river, eating through the landscape, finally producing clouds of steamy, hazardous “laze” as hot lava meets the cold ocean.

Bees understand the concept of zero

Scientists just learned that honeybees can understand the concept of zero. That puts bees in an elite club of clever animals – some birds, monkeys, humans – that can grasp the abstract notion of nothing.

Gulf of Mexico 2018 dead zone forecast

NOAA scientists project that this summer’s Gulf of Mexico hypoxic zone or ‘dead zone’ – an area of low to no oxygen that can kill marine life – will be about the size of Connecticut.

What we inherited from bug-eating mammal ancestors

If you’re an advocate for insects in human diets, go ahead. Munch on a grasshopper. The genes needed to digest bugs are still in our genome, inherited from the tiny, furry distant ancestors of all mammals, including humans.

Watch spacewalk June 14

On Thursday, 2 astronauts aboard the International Space Station will conduct a 6 1/2 hour spacewalk. NASA’s live coverage begins at 10:30 UTC (6:30 a.m. EDT). The spacewalk itself is scheduled to start at 12:10 UTC (8:10 a.m. EDT).

Coyotes in the park

Coyotes are the most famous of the wild animals species that have returned to North American cities and towns in recent years. Encountering them can be unnerving.

When is Eid in 2018?

A day – or two – after this month’s new moon, Muslims will celebrate Eid al-Fitr, the festival of breaking the fast. A young moon sighting determines its date. 

How far away was that lightning?

When you see a flash of lightning, do you count seconds until it thunders? An atmospheric scientist comments …

Mars explorers wanted!

Can you picture yourself as an explorer, farmer, surveyor or teacher on Mars? Download a NASA Mars poster (free!) that speaks to you.

Explore 20 years of Earth data

From NASA, 2 decades of planetary change. See detailed views of volcanoes fuming, hurricanes flooding, dams being built, wildfires sweeping across landscapes and more.

When did humans learn to count?

Linguistic clues show how people around the world first developed mathematical thought.

Guatemala’s Fuego volcano erupts in fury

The death toll is up to 65, with hundreds injured, from Sunday’s powerful eruption of Volcan de Fuego in Guatemala.

Can you see better than your dog, cat, or goldfish?

How does your kitchen look through the eyes of a cat, fish, fly or mosquito? A new study compares our human eyesight to the vision of other creatures.

2018 Atlantic hurricane season outlook

Atlantic hurricane season starts today. Experts are forecasting a 75% chance that the 2018 season will be near- or above-normal, thanks in part to a weak El Niño.

Are you prepared for a hurricane?

If a hurricane were approaching, would you and your family be ready? This post can help you prepare.

How do hurricanes get their names?

The World Meteorological Organization manages the formal system by which hurricanes receive their names. Find hurricane names for 2018 here.

The Standard Model theory of particle physics

“What a dull name for the most accurate scientific theory known to human beings … As a theoretical physicist, I’d prefer ‘The Absolutely Amazing Theory of Almost Everything’.”

Today is Walt Whitman’s birthday

“Love the earth and sun and the animals …” – Walt Whitman