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.

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.

Snowfall ahead in a warmer world, says study

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

Report: Summer ozone to get much worse in next 35 years

A new report warns of a 70% increase in the number of days with unhealthy summertime ozone levels by the year 2050.

Yellowstone supervolcano would cover North America in ash

It's highly unlikely a supervolcano will erupt at Yellowstone National Park. But, says a new study, if one did, volcanic ash would cover North America.

Testing a space rover under Alaskan ice

Scientists test a device on an Alaska glacier that could be used to explore an icy moon of Jupiter.

Are tornado outbreaks on the rise?

A new study has found that dangerous tornado outbreaks in the U.S. are on the rise.

Strong 6.0-magnitude earthquake rocks San Francisco Bay area

Strong earthquake struck San Francisco Bay area early on August 24, 2014. Power outages, moderate damage across region, closed highways, serious injuries, no deaths.

A trip down Canada’s Iceberg Alley

It's been a banner year for iceberg sighting in Iceberg Alley, the area off northeastern Newfoundland where the Titanic struck an iceberg and went down in April, 1912.

Researchers find life beneath half a mile of Antarctic ice

The discovery of bacteria in a lake under 800 meters of ice suggest the possibility that similar life might exist elsewhere in our solar system.