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A first-of-its-kind study found lead, arsenic and other heavy metals in various tampon brands, but didn't link them to harmful health effects. Experts explain why it matters — and what to watch for.

A panel of advisers to the FDA voted against the potential use of MDMA for treating PTSD.

Ebola is one of the nasty viruses that can hide in the body even after a patient recovers and tests negative. It can reemerge and trigger a new outbreak years later. How do they survive? And how can they be kayoed?

PBS has been a home for independent documentaries for more than 50 years. But with the closure of the Corporation for Public Broadcasting, nonfiction storytellers have to figure out a way forward.

The Mojave Desert tortoise has long been considered a threatened species, but in June, California declared it endangered.

Wildfires last January destroyed communities around Los Angeles. Homeowners say recovery has been slowed by fights with insurers to get their claims paid.

Wilmer Vasquez died at just 29 years old after suffering heat illness during the hottest year on record. His brother, Yonatan, says climate change played a big role.

A new photo series from Filipino photographer Macy Castañeda Lee offers a visually striking view of the mundane task of doing laundry and the role it plays in a rural economy.

A hospice in Uganda asked itself: Can we do more than ease the pain of dying? Can we actually prevent deaths from cervical and breast cancer?

President Trump provided conflicting messages about when the U.S. and Israel's war with Iran will end. And, NPR investigates how late convicted sex offender Jeffrey Epstein leveraged ties with scientists.