Some species of fish, notably parrotfish and wrasses living on coral reefs, change their biological sex as they age, beginning life as females and later becoming functionally male.

Using more than 30 years of earth satellite images, scientists at Tufts University and the non-profit conservation organization Defenders of Wildlife have discovered that habitat loss for imperiled species in the U.S. over this period was more than twice as great on non-protected private lands than on federally protected lands. 

Spring is coming, and with it comes the promise of warmer weather, longer days and renewed life.

When El Nino approaches, driven by warm Pacific Ocean waters, we’ve come to expect both drenching seasonal rains in the southern U.S. and drought in the Amazon.

Groundwater is the largest source of freshwater, one of the world’s most precious natural resources and vital for crops and drinking water.

A cold front, warm front, and high-pressure system left their signatures in the clouds.

Professor Joshua Fu and colleagues studied wildfires in that state from 2011 through 2014, gaining valuable insight into how smoke from the fires affects the health of people in its path.

Researchers find evidence of a cosmic impact that caused destruction of one of the world’s earliest human settlements.

Some species will be exposed to more cold winter air without the insulating protection of snow cover.

February was wetter and warmer than average.