Tornadoes tear though Tennessee, 25 dead

Tornadoes ripped through Tennessee early Tuesday, leaving at least 25 people dead, destroying buildings and toppling power lines hours before the southern US state voted in Super Tuesday primaries.

Aerial photographs shed light on Mont Blanc ice loss

In 1919, the Swiss pilot and photographer Walter Mittelholzer flew over Mont Blanc in a biplane photographing the alpine landscape. Exactly 100 years later, researchers from the University of Dundee in Scotland have recreated ...

How we used drones to monitor coastal erosion in Ghana

Delta environments are low-lying and highly vulnerable to flooding and erosion by ocean waves. And these hazards are likely to increase as the world's climate changes and sea levels rise. Monitoring these hazards, and their ...

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