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Cheetahs don't often hunt at their top speed, scientists are finding. Come mealtime, what matters most is the animals' ability to accelerate and to take tight corners.

Millions of monarch butterflies migrate to the mountains of Mexico each winter. Authorities are now investigating the apparent murders of an activist and tour guide at the Michoacán reserve.

Sonny Perdue, who's been named to head the U.S. Department of Agriculture, has held many political offices in his home state of Georgia. Farmers liked him. Environmentalists, not so much.

Davis was a public intellectual best known for his book City of Quartz and other searing critiques of capitalism, corruption and environmental degradation.

Climate change is transforming the Arctic, and putting indigenous communities in Alaska at risk.

Trees not only help slow the effects of climate change but also help clean and cool the air around them.

A new study on mice shows that luck in early life can determine success as an adult, especially when competition is high.

A decade ago, Trevor Tucci was 8 years old, making waves with his Redbird Swim Club teammates.Today, he is making plans to attend Olivet Nazarene…

With increased car and foot traffic, the ground underneath the Tidal Basin — home to memorials to Thomas Jefferson, FDR and MLK Jr. — is sinking. As sea levels rise, the walkways flood daily.

Stacy Jupiter works with the people of Fiji to protect the oceans. Two of her most important life lessons came from the Peace Corps: 1) listen and 2) nothing ever goes according to plan.