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A new study published in Science looked at thousands of marine animals over a 540-million-year evolutionary span. Their conclusion: Most of them got larger.

U.S. Navy-trained dolphins and their handlers will participate in a last-ditch effort to catch, enclose and protect the last few dozen of Mexico's critically endangered vaquita porpoises to save them from extinction.

Many farmers who grow corn and soybeans to feed livestock use too much nitrogen fertilizer, which can cause a host of environmental problems. To fix them, scientists say we should eat less meat.

Thirteen months after an Environmental Protection Agency mistake sent millions of gallons of bright orange wastewater into a Colorado river, the agency has announced a cleanup for the Gold King Mine.

Luis Videgaray, confidant of President Enrique Peña Nieto, is considered the "architect" of Donald Trump's unpopular visit to Mexico last week.

Many anti-obesity programs focus on children's diet and behavior during the school year. A new study is the latest of many that finds the weight gain comes when kids are out for summer vacation.

Current drugs aren't working as well. Old drugs may be making a comeback. And a poet sums up the reason that malaria fighters met this week.

From San Diego State University to a Hillcrest bar, several spots in the city have organized gatherings for the highly anticipated matchup between Hillary Clinton and Donald Trump.

Many international students trying to get back to classes at NYU, MIT, Yale and other U.S. schools are now in limbo.

The idea behind "clean coal" is technology that would capture for reuse most of the carbon dioxide emitted by coal-burning power plants. Entrepreneurs aim to use similar tech to clean natural gas.