Glaciers' 'buzz-saw effect' can level mountains. But at high altitudes, glaciers can freeze to mountains and shield against erosion, new research suggests.
The 4.4 magnitude LA earthquake rattled the city Tuesday morning. Experts say it is impossible to tell whether small quakes are a sign that other bigger ones may follow.
The earthquake in Chile is a reminder of the lively geological activity under Earth's surface.
A Galapagos giant tortoise at the Charles Darwin Research Station eats her greens. This captive tortoise is part of a breeding program that has already released hundreds of juveniles back onto their native islands. Full-grown adults can weigh more than 600 pounds and live up to 100 years or more. Giant tortoises are found only in the Galapagos.
The islands were alive with vividly colored crabs, birds, and iguanas.