Though the dynamics are mysterious, sunspots may be linked to heavy rains, flooding, and even outbreaks of bug-borne disease in East Africa, a new study says.

A new model warns that half of the years after 2009 will be warmer than 1998, the hottest year on record.

Soot from American coal burning before 1950 was likely a major contributor to warming the Arctic climate, a new study says.

Unprecedented floods, heat waves, snowstorms, and wildfires have afflicted Earth in the first months of 2007, the UN reports.

A two-month expedition has uncovered a handful of new animal species in a remote forest that has been out of scientific reach for nearly 50 years.

Coral reefs in the Indian and Pacific Oceans have been disappearing much faster and for a longer time than previously thought, a new study shows.

A massive new survey effort found fewer than 1,500 wild tigers—a sharp decline from previous estimates released just five years back.

Plants thought to treat impotence and cancer are disappearing from Uganda's rain forest before scientists can study whether they actually work, experts say.

The world's largest freshwater lake is both shrinking and getting hotter, occurrences that may be related, experts say.

See a roundup of the week's news and events: Bridge over Mississippi River collapses, new Veil Nebula images released, and more.

In a legally symbolic gesture, Russian mini-subs dove under the Arctic ice to try and secure rights to the region's potential natural resources.

A study of haze over India shows that aerosols, long thought to be global coolers, can sometimes warm the lower atmosphere just as much as greenhouse gases.

Four rare apes were shot in Africa's Virunga park on July 22. Get up close with other Virunga gorillas as rangers patrol the park to prevent another tragedy.

A unique kind of underwater vacuum has helped stop an invasion of an exotic algae, which is smothering Hawaii's native corals and grasses.

The number of hurricanes that form each year is twice what it was a hundred years ago and shows no signs of "backing down," scientists say.