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Ash cloud over Volcan del Ruiz, 20 May 2016 via Servicio Geológico Colombiano

Colombian volcano activity sparks concern

Ash plumes and tremors in Colombia’s Nevado del Ruiz volcano are raising fears of destructive mudflows and the possibility of an eruption.


Humans domesticated dogs twice, says study

New research suggests that dogs were domesticated not once, but twice, in different parts of the world.

Image by Kevin Krajick of Lamont-Doherty Earth Observatory.

Did humans evolve with grasslands?

Scientists have uncovered a 24-million-year record of vegetation in the region of east Africa where early humans likely evolved.


Join the fun at ALCon 2016

ALCon 2016 is the national amateur astronomy convention, held this year from August 10-13 in Washington, D.C. Registration is now live!

Hurricane Alex as seen on January 14, 2016, by the the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. Image via NASA Earth Observatory.

How do hurricanes get their names?

The Atlantic hurricane season started June 1. Here are the hurricane names for the 2016 season.

Finder chart for KIC 8462852. It's located in the direction to the constellation Cygnus, which is part of the famous Summer Triangle asterism, visible at this time of year.

Help astronomers observe Tabby’s Star

They’re using Kickstarter to raise funds needed to unravel one of astronomy’s biggest mysteries. Is the star KIC 8462852 surrounded by an alien megastructure?

Lake Baikal photo by Alexey Trofimov
Photographer, Traveler, photoguide on Baikal, Russian Geographical Society. View more photos from Alexey Trofimov.

Deep, ancient Lake Baikal in trouble?

The world’s deepest lake – Lake Baikal – is also the world’s oldest lake. Controversy surrounds construction of hydropower stations on a river that feeds the lake.

Working bee colonies. Image via Elina L. Nino

Deciphering mysterious honey bee decline

While the massive and sudden colony collapses that occurred a decade ago have abated, honey bees are still dying at troubling rates.

Hurricane Sandy 2012, via NASA GOES

Are you prepared for a hurricane?

Now, early in the season, is the time to make a plan to stay safe if a hurricane approaches your area.

Detail from a portrait of a young woman - from a fresco from Pompeii - thought to be Sappho. Via Museo Archeologico Nazionale (Naples) via Wikimedia Commons.

Pleiades setting through Sappho’s eyes

Sappho, a renowned poet of ancient Greece, wrote of the Pleiades star cluster setting at midnight. Scientists have wondered, what time of year did she see it?