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Cities across California are clearing out brush and invasive grasses on hillsides to help keep wildfires from spreading. But in some towns, in addition to hired hands, they're also using goats.

Whether Trump ultimately follows his team of hotspurs or uses them as heat shields as he negotiates a new reality, he sees them all as serving his purpose — not the other way around.

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.

People are worried that the virus could be spread by air conditioning systems. Here's what researchers do — and don't yet — know.

When it comes to hair-raising experiences, why do some of us cower while others can't get enough? Ken Carter, an expert on adrenaline junkies, reveals what makes them tick.

The Trump administration could give companies permission to set off sonic explosions to explore for oil and gas deposits. Scientists say this could seriously harm marine life.

When cows burp, they emit the potent greenhouse gas methane into the atmosphere. But by adding seaweed to the cows' diets, researchers are noticing a dramatic reduction in methane production.

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.

Research shows more people are linking climate change to extreme weather events, like the ongoing flooding in America's heartland. Experts are hoping it also inspires action.

Ghost Fleet, a gripping new documentary about modern-day slaves in the global fishing industry, follows Patima Tungpuchayakul, a Thai woman who's devoted her life to freeing men from forced labor.