Becky Oskin

The powerful aftershock that struck Nepal today (May 12) could trigger deadly landslides on slopes already weakened by the April 25 earthquake, experts said.

Timeworn Antarctica ice suggests a strong link between carbon dioxide levels and glacial cycles for the past million years.

A stunning image of more than 15,000 airplane flights around the world shows that satellite tracking of commercial aircraft is moving closer to reality.

Subtropical Storm Ana threatens the Carolinas a month before the official June 1 start of the Atlantic hurricane season.

Radar waves helped search and rescue teams find and save four people trapped in collapsed buildings after the Nepal earthquake.

The nation's capital sits on shaky ground that jiggles like pudding when earthquakes rattle the East Coast.

The Chicxulub meteor impact 66 million years ago may have triggered a magnitude-11 earthquake that shook loose massive amounts of lava in India.

Two super-fast conveyor belts of sinking crust explain why India set a continental speed record as it crashed into Eurasia.

Eerie sounds from the edge of space were recorded for the first time in 50 years aboard a NASA student balloon experiment.

A new study finds that the biggest aftershocks tend to strike at the edge of the original earthquake.

The first good satellite view of Nepal's deadly earthquake could explain why damage in the city was so severe.

For the first time in more than 30 years, lava is flowing on the floor of Halema'uma'u crater in Hawaii.

The roiling lava lake atop Hawaii's Kilauea volcano is threatening to overflow for the first time since the molten pool appeared in 2010.

Photos of the lava lake in Kilauea volcano's Halemau'mau' crater, which is close to overflowing.

Underneath Antarctica's Dry Valleys lies a vast and ancient network of salty, liquid water filled with life, a new study finds.

Indian Ocean tsunamis destroyed one of the world's most important silk-route ports in the 15th century, new research finds.

Nepal still faces more deadly earthquakes in the near future, even after the magnitude-7.8 temblor that killed more than 3,000 people on Saturday.

Landslides coming off Catalina Island's steep slopes could send tsunamis racing toward popular Los Angeles and Orange County beaches.

Earthquakes threaten roughly half the U.S. population, or more than 143 million people, a new study finds. That number rises when Hawaii, Alaska and Puerto Rico are included.

New earthquake hazard maps released today highlight 17 hotspots where communities face a significantly higher risk of earthquakes.

Geologists have finally found the source of an 1872 earthquake that rattled windows from Washington state to Montana.

Shattered cave formations in the central and eastern United States preserve one of the longest records of powerful earthquakes in these regions.

Two terrifying hurricane names, Isis and Odile, were dropped from the Pacific storm list for 2016.

The first three months of 2015 set new global heat records.

Scientists plotted some 29,000 reports of roadkill to identify the most hazardous roadways for California's wildlife.