Elaisha Stokes

After four years of devastating drought, some California reservoirs are back to normal, but conservationists warn that it would be a mistake to lift water restrictions.

The rate of change to Earth's climate is unlike any time in modern history, says the World Meteorological Organization, as US and UK researchers say carbon emissions are higher than in 66 million years.

Next month marks the anniversary of one of the worst nuclear accidents in history and researchers have found dangerously high levels of radioactivity in grains, milk, and other foods consumed in Ukraine and Russia.

The drought collapsed agricultural yields and livestock herds, driving as many as 1.5 million Syrians from rural areas into cities, where resources were already scarce.

People for the Ethnical Treatment of Animals says that SeaWorld infiltrators encouraged members to commit arson at the theme park and drain animal tanks.

Researchers have found high levels of pharmaceuticals in the waters and fish of Puget Sound — and that could cause problems for humans, too.

Over half of infectious diseases originate in animals, yet early warning signs, like seizures or deaths in poultry or primate populations, are rarely monitored, say biologists in a new study.

The Ebola outbreak highlights how disease can spread from animals to humans; but it's a problem that cuts both ways.

As the Ebola outbreak in West Africa continues to spread, the country that has experienced the most outbreaks of the virus ever appears to have halted another one.