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Massachusetts once offered a bounty for gray seals. After conservation efforts, the New England population bounced back, and Google Earth images show more seals than scientists had previously counted.

AED-carrying drones beat ambulance times to the sites of previous cardiac arrest cases in a rural area of Sweden, a study finds. But this has yet to be tried in real emergencies.

There is no definitive standard for identifying or treating veterans at risk of suicide, according to a new study out of Oregon Health and Science University.

Beef and poultry get labels designating humane treatment; seafood doesn't. Two fishermen want to change that. Their state-of-the-art ship makes fishing safer for crew and minimizes pain for fish.

In an effort to save irreplaceable varieties from disease and other threats, plant cuttings are being "cryopreserved" — plunged into liquid nitrogen for later revival.

Author Mark Bowden says the capture of Hue, Vietnam, was part of a wave of well-planned Communist attacks that shocked American commanders and helped turn U.S. public opinion against the war.

His family says that Warmbier, 22, has been in a coma since last spring. In March 2016, a North Korean court sentenced him to 15 years in prison and hard labor.

The maker of one medical treatment for opioid abuse has successfully lobbied statehouses around the country to pass policies that tilt addiction treatment practices in favor of the company's drug.

Fifty years ago, lawyers before the Supreme Court talked of "psychological evils" and "racial integrity" when it came to interracial marriage.

Wonder Woman's creator had a few secrets of his own. Historian Jill Lepore describes William Moulton Marstothe's unusual life in The Secret History of Wonder Woman. Originally broadcast Oct. 27, 2014.