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Image credit: Davide Bonadonna
Science Wire | Sep 15, 2014

Bigger than T. rex, this dinosaur hunted in water

Spinosaurus was the largest known predatory dinosaur to roam the Earth. Scientists now say that it was also the first truly semiaquatic dinosaur.

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Blogs | Sep 15, 2014

New report detects substantial rise in greenhouse gases

The most recent rise in carbon dioxide is the largest annual change seen for this gas since 1984.

Image credit: University of Birmingham
Science Wire | Sep 12, 2014

New scans reveal hidden monuments of Stonehenge

The startling results of a new survey include 17 previously unknown monuments and dozens of burial mounds surrounding Stonehenge.

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Blogs | FAQs | Sep 11, 2014

What are cloud streets?

Cloud streets are long rows of cumulus clouds that are oriented parallel to the direction of the wind. Check out these cool images!

Image Credit: Don DeBold
Blogs | Sep 10, 2014

Lifeform of the week: Skunks

Evolutionary biology can explain skunks’ striking appearance, but only chemistry can get rid of the smell.

Photo credit: Almannavarnir
Sep 09, 2014

Craters have appeared on two glaciers in Iceland

The recent volcano eruptions in Iceland have created enormous circular depressions in two of the country’s glaciers.

Super Harvest Moon 2014 by Annie Lewis
Today's Image | Sep 09, 2014

Shine on Harvest Moon!

In case you missed it! Photos of the 2014 Harvest Moon from EarthSky friends.

Ozone hole over Antarctica at the peak of this year's season of ozone depletion, October, 2013.  Image via NASA/Ozone Hole Watch.
Science Wire | Sep 08, 2014

What’s the source of a mysterious ozone-depleting chemical?

The Montreal Protocol put the brakes on ozone-depleting chemicals 30 years ago. But one compound is still abundant in Earth’s atmosphere. Where’s it coming from?

Photo credit: J Gilpatrick/M Lynn/NOAA
Science Wire | Sep 08, 2014

California blue whales rebound from whaling

In a conservation success story, the number of California blue whales has rebounded to near historical levels after being hunted to near extinction.

The Global Shorebird Counting is one of the key events of the World Shorebirds Day. This is not particularly a citizen science program, but rather an effort to rise awareness for the importance of regular bird monitoring as the core element of bird protection and habitat conservation.  Photo via World Shore Bird Day.
Science Wire | Sep 06, 2014

Today is the first-ever World Shorebirds Day

Saturday, September 6, 2014, is the first World Shorebird Day. How to participate, here.

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Blogs | Sep 05, 2014

State of emergency issued for Hawaii’s Kilauea Volcano

Residents in the path of the new lava flow at Hawaii’s Kilauea Volcano are being urged to finalize their evacuation plans.

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Science Wire | Sep 04, 2014

Researchers discover remains of colossal 65-ton dinosaur

Researchers have uncovered a 77-million year old, plant eating, super-massive Titanosaur. The huge animal weighed as much as a herd of elephants.

Image Credit: Geoff Gallice
Blogs | Sep 03, 2014

Lifeform of the week: Hoatzin

Physiologically and evolutionarily, the hoatzin is a fascinating bird. Just hold your nose when you’re near it.

Photo credit: Anthony Quintano/Flickr
Science Wire | Sep 02, 2014

U.S. Southwest may face mega-drought this century

With ongoing climate change, the long view of future drought risk in the U.S. Southwest is not a pretty picture, say scientists.

Artist Andy Thomas animates bird sounds
Blogs | Videos | Sep 02, 2014

What if you could see the sound of a nightingale?

Australian multimedia artist Andy Thomas creates 3D animations of bird songs. He calls them “audio life forms.”

White plume from the active fissure at Holuhraun in Iceland.
Science Wire | Sep 02, 2014

At Iceland volcano, a white plume rises from the lava fountains

Observers around the world are watching the Bárðarbunga volcano in Iceland. Read about four likely scenarios for what might happen next.

Sliding stone at Racetrack Playa via Chris Tinker
Science Wire | Sep 01, 2014

Death Valley sliding stone mystery solved

Watch the video in this post, and become one of the first people on Earth to see the famous sliding stones of Death Valley’s Racetrack Playa in motion.

Image Credit: Wikipedia
FAQs | Sep 01, 2014

What’s the birthstone for September?

September’s birthstone, the sapphire, was said to represent the purity of the soul.

Blue hour by Daniel McVey
FAQs | Photos | Aug 30, 2014

What is the blue hour?

The blue hour – when the sun is some distance below the horizon, when the sky is deep blue and the landscape is suffused with bluish light – is a good time to take photos.

By Göran Strand. Used with permission
Blogs | FAQs | Photos | Aug 29, 2014

What makes a red rainbow?

Red rainbows happen when the sun is on the horizon. They’re created in much the same process that causes a sunset or sunrise to look red.

Image credit: Christine Daniloff/MIT
Science Wire | Aug 28, 2014

Snowfall ahead in a warmer world, says study

An MIT study finds big snowstorms will still occur in the Northern Hemisphere despite global warming.