Explainer

A new United Nations treaty is bringing a once-in-a-generation chance to save our open oceans and all the life that depends on them.

The biology of death caused by particulate matter.

Famous for their elegant colors and transcontinental feats of migration, these beloved pollinators are also in free fall, as habitat loss and heavy use of herbicides jeopardize their future.

Gun-control activists want to use financial levers to curtail firearm sales. Can we do the same for carbon emissions?

Prevention is the best medicine for this tick-borne disease—but we’ve got our work cut out for us.

Our lawyers are going after the administration’s outright illegal actions.

Before a president auctions off U.S. coastlines to oil companies, he has to ask state governors, Congress, local businesses, and you. Here’s how Trump is ignoring that process—and how it’s endangering coastal communities.

As temperatures rise, mosquitoes and ticks thrive. And so do the diseases they carry.

From fisticuffs to force-feeding—a history of the fight for women's rights.

Coal can never be king, even if Scott Pruitt plays the joker.