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Epicenter of April 25 Nepal earthquake
Science Wire | Apr 25, 2015

Powerful 7.9-magnitude earthquake rocks Nepal

The quake’s epicenter less than 50 miles from capital city of Kathmandu. Hundreds dead and many historic buildings collapsed.

Screen Shot 2015-04-23 at 12.42.25 PM
Science Wire | Apr 24, 2015

Biggest five – or six? – mass extinctions ever

Over 99% of all the animal species that have ever lived are now extinct. Here are Earth’s biggest extinctions, in under 5 minutes. New video from AsapSCIENCE.

Video still via Dario Almonacid
Science Wire | Apr 23, 2015

Spectacular Calbuco volcano in Chile!

Amazing photos and videos of Chile’s Calbuco volcano, which began erupting Wednesday for the first time in over 42 years.

Fracking diagram via Huffington Post
Science Wire | Apr 23, 2015

More earthquakes due to human activities, says USGS

Of the eastern and central U.S. states studied so far, Oklahoma is by far the worst-hit in recent years. Texas, Kansas, Colorado, New Mexico and Ohio all have had more earthquakes in the past year.

Screen Shot 2015-04-22 at 7.48.40 PM
Science Wire | Apr 23, 2015

Watch the Arctic ice pack vanish

Decades ago, most of Arctic’s winter ice pack was made up of thick, perennial ice. Not anymore. Watch the change in this one-minute animation.

Brown recluse spider. The photo shows its size in relation to a quarter. – Photo courtesy of K-State Research and Extension
Science Wire | Apr 23, 2015

10 things to know about brown recluse spiders

It’s their active season. Here are ten things to know about these venomous spiders that like to live where we do.

Science Wire | Apr 21, 2015

Special Earth Day video: The Untouched

It showcases the beauty of nature and tries to convey that “we can’t reverse time to travel back to bring back all that we have lost by mistake.”

Science Wire | Apr 21, 2015

Celebrate Earth Day 2015 with NASA

Share pics and video of your favorite places on Earth to social media with hashtag #NoPlaceLikeHome.

First Earth Day 1970
Science Wire | Apr 21, 2015

Why is Earth Day on April 22?

April 22, 1970 – Arbor Day – was the first Earth Day. Today, a common practice in celebration of Earth Day is still to plant new trees.

I don’t want to bite you. Photo credit: Travelbag Ltd
Science Wire | Apr 21, 2015

What’s the real deal with shark attacks?

Sharks are incredibly unlikely to bite you. They’re even less likely to kill you. However, we remain fascinated with their ability – and occasional proclivity – to do just that.

This marine scene shows an assortment of marine tetrapods that lived in Cretaceous oceans near the end of the "Age of Reptiles," including a sea turtle, an early flightless marine bird, a large mosasaur and a long-necked elasmosaur. In April 2015, a team of Smithsonian scientists synthesized decades of scientific discoveries to illuminate the common and unique patterns driving the extraordinary transitions that whales, dolphins, seals and other species underwent as they moved from land to sea, offering a comprehensive look at how life in the ocean has responded to environmental change from the Triassic to the Anthropocene. Image credit: Smithsonian/Karen Carr
Science Wire | Apr 20, 2015

From fins to legs to fins again

Marine tetrapods, a group of animals including whales, dolphins, seals, and sea turtles, have moved from sea to land and back to the sea over the last 350 million years

Photo credit: Robbo-Man
FAQs | Apr 20, 2015

What is earthshine?

That glow over the unlit part of a crescent moon – called earthshine – is light reflected from Earth.

Blogs | Apr 20, 2015

Ocean acidification drove Earth’s largest mass extinction

New evidence suggests that ocean acidification played a key role in the Permian–Triassic mass extinction event 252 million years ago that killed most life on Earth.

The smell of rain.  Photo is a video still from Jon Kasbe's wonderful short film Life Reflected.
Science Wire | Apr 18, 2015

What is the smell of rain?

The word for it is “petrichor.” It’s the name of an oil that’s released from Earth into the air before rain begins to fall.

Frames from a high-speed video of a metal object slamming into a bed of artificial soil, sand or rock. Shown at slow (top), medium (middle) and high impact speeds (bottom), the changing impact forces illuminated in each frame help explain why soil and sand get stronger when they are struck harder. Photos courtesy of Abram Clark.
Science Wire | Apr 17, 2015

What happens underground when a meteor hits

High-speed videos show what happens underground when an asteroid – or missile – strikes Earth.

Science Wire | Apr 15, 2015

Sperm whale meets deep-sea vehicle

Encounters between sperm whales and ROVs – remotely operated underwater vehicles – are rare. Watch this video, posted April 14.

View larger | Image credit: NASA
Science Wire | Apr 15, 2015

Tornado track in northern Illinois

Satellite view makes clear how unlucky the 150 people of the town of Fairdale were on April 9.

What's in a name anyway?  Image credit: WIkimedia
Science Wire | Apr 13, 2015

Brontosaurus is back!

If you had to name a dinosaur, you might say Brontosaurus. But, since 1903, experts have said that Brontosaurus isn’t a separate species. Now Bronto is back!

Airplane glory via Brocken Inaglory at Wikipedia
FAQs | Apr 12, 2015

What is a glory?

People traveling in airplanes often see glories. The sun has to be behind your head. You’ll see the plane’s shadow cast on a cloud, surrounded by a halo of light.

Photo via Ian Wittmeyer on photo.net
FAQs | Apr 10, 2015

Why does the sky change color before a tornado?

There are a couple of theories that suggest what creates the strange greenish-yellow color that can precede a storm.

Susan Gies Jensen in Odessa, Washington posted this photo to EarthSky FAcebook.  She wrote: "I learned that the northern lights were out last night from Facebook friend Chatfield Photographics and while I was taking images, was surprised to capture the unexpected appearance of the ISS!"
Science Wire | Apr 10, 2015

Auroras over US and similar latitudes

A geomagnetic storm sparked a display of auroras on the night of April 9-10. Auroras sighted as far south as Colorado! The storm may intensify later today.