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Posts by EarthSky Voices

A simulation of the dark matter structure in the universe.   This image covers an area of 20 megaparsecs, or about 1.3 billion light-years.  Image via CfA.
Science Wire | Apr 27, 2015

What is dark energy?

Instead of pulling galaxies in our universe together, gravity seems to be driving them apart. How can gravity be repulsive, when our everyday experience shows it’s attractive? To explain it, we need dark energy.

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.

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.

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!

Image via Shutterstock
Blogs | Apr 08, 2015

Game on! Teaching science with games

The average U.S. student has played roughly 10,000 hours of games by the end of high school – only a little less time than the hours spent in school.

Ice worm s can only survive at temperatures close to freezing. Image credit: Rutgers University
Science Wire | Apr 08, 2015

Bacteria key to ice worm survival

Living in ice is no easy feat, but ice worms make it work. Part of the secret to their survival on glaciers lies in a symbiosis between worm and bacteria.

Antarctica’s Brunt Ice Shelf photographed in October 2011 from NASA’s DC-8 research aircraft during an Operation IceBridge flight. Michael Studinger/NASA
Science Wire | Mar 31, 2015

Shrinking of Antarctic ice shelves is accelerating

A new study shows that not only has Antarctica’s ice shelf volume gone down, but losses have accelerated over the past decade.

Stream in Zackenberg drainage. Imge credit: Mikkel Tamstrof
Science Wire | Mar 30, 2015

Greenland glacier melt increases mercury discharge

As glaciers melt, streams carry more mercury into the ocean, increasing risk of mercury poisoning in humans and wildlife in Greenland and in adjacent coastal countries.

View larger. |  Nova Sag number 2 via Tom Wildoner.
Science Wire | Mar 29, 2015

Nova Sagittarii observation, March 29

The brightness of this unusual nova has gone up and down and now back up again. EarthSky friend Tom Wildoner tells you how to see the nova before it’s gone!

Science Wire | Mar 27, 2015

India’s Mars probe has fuel for extended mission

India’s Mars Orbiter Mission (MOM) was expected to end on March 24. But it turns out that the probe could have another 6 months of life left in it.