A 5-gallon (18.9-liter) leak spurred a production shutdown at the U.S.'s largest reserve and triggered a new round of debate over the aging pipeline's future.
Snowfall in Antarctica has stayed the same for the past 50 years, new research shows, suggesting that the snows aren't slowing sea level rise as some scientists predicted.
The Arctic island's ice sheet is melting three times faster than it was five years ago, according to a new study, and is contributing to global sea level rise.
Researchers have used a sophisticated imaging technique to watch lava move though an active volcano. The method may become a powerful tool for predicting eruptions.
The sooty shearwater has made a nest in the record books—the small bird's huge commute from New Zealand to the North Pacific is the largest ever recorded electronically.
The territorial birds sing a four-part chorus in groups and are so precise that a casual listener wouldn't realize there was more than one singer, experts say.
The proposed federal designation in the Puget Sound region of the U.S. Northwest has residents, conservationists, and developers locked in passionate dispute.
Many of Cuba's wetlands, forests, and reefs remain unspoiled. The reason, experts say: Cuban President Fidel Castro's environmental policies—and the island's economic isolation.
An oxygen-poor region of water that suffocates marine life has appeared again off the Oregon coast, and this year it may even extend into Washington State waters.
Seeding Earth's atmosphere with sulfur would reflect the sun's light and heat back into space, cooling the effects of global warming, a Nobel Prize-winning chemist says.
An unusual sight livened the sunset for scientists working in one of the coldest places on Earth—a rare nacreous cloud, which form only at extremely icy temperatures.
