One wildlife biologist is tracking the planet's rarest animals, in hopes of understanding why they’re scarce and what it means for all species. We explore his research, and how technology is helping catalog the world's biodiversity.
Small amounts of the drugs that people take end up in wastewater and then in streams and rivers. It's usually not enough to harm the health of humans who swim in or drink the water. But there is growing evidence that pharmaceuticals in wastewater may affect wildlife.
Sickly sea lion pups have been getting stranded on the coast of Southern California this winter. Audie Cornish speaks with Sarah Wilkin, the stranding coordinator with the National Marine Fisheries Service for the state of California, about why it's happening and how marine mammal centers are trying to help them.
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