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Otters can be trained to do search and rescue in murky waters. In Florida, law enforcement is now using one of them.

NPR's Short Wave team talks about how air pollution affects the brain, what ancient squirrel poop reveals about prehistoric fauna, and a whale graveyard on the ocean floor.

For decades, immigrants who are legal permanent residents in the U.S. could get loans through the Small Business Administration, a core pillar of small-business lending. Not anymore.

NPR's Ailsa Chang speaks with Sophia Laforteza, Lara Raj, Daniela Avanzini, and Jeung Yoonchae about the ups and downs of being part of the global girl group KATSEYE.

The U.S. and Iran appeared closer to reaching a peace deal on Friday, as a sequence of social media posts signaled progress. President Trump had previously been amping up his rhetoric against Iran.

The announcement follows Trump's decision to nominate an ally and political attack dog to serve as acting director. The pick sparked a backlash that doomed efforts to renew a key intelligence tool.

The DRC has improved testing capacity for Ebola with two facilities operating in or near the epicenter. But this still may not be enough to keep up with a rapidly expanding disease.

A study of more than 2,300 9- to 10-year-olds found that socioeconomic factors explained most differences in the preteens' brain development.

The administration imposed mandatory quarantine orders on two passengers from the cruise ship hit by hantavirus and is blocking Americans who catch Ebola from returning home for treatment.

Our guests today are Ryan Jackson and Ned Weinshenker. We discuss a new CRISPR system that can be used to selectively kill cells, and some recent breakthroughs in the growing technology.