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Stream now with YouTube. Sloths are notoriously hard to see, so they can be hard to help. But one furry creature is at the heart of sloth conservation in Costa Rica. An award-winning zoologist, her spirited right-hand woman, and their sloth-sniffing rescue dog team up in Costa Rica’s lush jungles for the first-ever sloth census. Mixing science, adventure, and plenty of laughs to protect these lovable creatures. The team studies at-risk sloth populations by tracking their poop and stress levels, combining forces with an all-female film crew to capture fascinating and rarely observed sloth behaviors on camera.

Lecture title: Regenerative medicine for the treatment of MS: Enhancing repair to prevent progression Front Row lecture with Luke Lairson, PhD Description: Multiple sclerosis (MS) is a debilitating autoimmune disease that disrupts the central nervous system, causing symptoms like muscle weakness, cognitive challenges and a gradual loss of function that current treatments cannot fully repair. MS arises when the immune system attacks the myelin sheath, the protective layer insulating neurons. Scripps Research chemistry professor Luke Lairson will discuss his research on the body’s natural repair pathways—specifically those that activate endogenous stem cells to restore myelin. His work aims to develop therapies that complement existing therapeutic approaches and halt MS progression. ABOUT SCRIPPS RESEARCH Scripps Research is an independent, nonprofit biomedical institute based in La Jolla, California, and ranked one of the most influential in the world for its impact on innovation. The Front Row lecture series, now in its eighth season, offers an exclusive glimpse into groundbreaking scientific discoveries in action. Reserve your seat today and learn how our scientists remain at the forefront of advancing the future of science and medicine. Join us—in the front row. Scripps Research on Facebook / Instagram / TikTok

Premieres Friday, April 25, 2025 at 8 p.m. on KPBS TV / PBS app. Follow Rachmaninoff’s journey from a Russian aristocrat to an American artist after the Bolshevik revolution. Forced to rebuild at 44, he embraced modern technology, toured extensively and reinvented his career while longing for his lost homeland.

National Adopt a Shelter Pet Day is on April 30. To celebrate, NPR wants to know how your pet has changed your life. We would also love to see photos of your purr-fect fur-ever friend.

Two studies of wild chimps point to the evolutionary roots of human language. The studies found that chimp communication often relies on rhythmic structures and call combinations.

Trump targets Chinese technology with 20% fentanyl tariff and eyes semiconductors in a "National Security Tariff Investigation" over coming months.

The government's colossal failure to respond after Hurricane Katrina led to major reforms at the nation's top disaster agency. Now, the Trump administration has reversed some of those changes.

Former FDA chief Dr. David Kessler says the new weight-loss drugs are a powerful tool to fight obesity. But they come with pitfalls. Here's his tips for how to use them successfully.

Critics warn that Trump's demands for business leaders to step down, and for the government to take a cut of sales, threaten American-style capitalism.

Home appliance companies are rushing to put AI into products. It's motivated by a few factors, including gathering data and creating a long-term customer relationship, experts say.