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CNN's chief medical correspondent says it's never too late to develop new brain pathways. Even small changes, like switching up the hand you use to hold your fork, can help optimize brain health.

California’s underwater kelp forests are in trouble. A combination of climate change and hungry purple sea urchins have decimated these vital forests. But the Monterey Peninsula has a kelp forest guardian — sea otters.

Sunday, March 3, 2024 at 9 p.m. on KPBS 2 / Stream now with the PBS App + Encore Tuesday, March 5 at 4 p.m. on KPBS 2. If oceans continue to warm at the current pace, coral reefs could be wiped out by the end of the century. But scientists from around the globe are rushing to help corals adapt to a changing climate through assisted evolution.

Experts look into a new study that claims wearing a neck gaiter may be worse than no mask at all. And they discuss other face coverings such as goggles and plastic face shields.

In remarks after a divided Senate approved his $1.9 trillion coronavirus relief package, Biden credited dogged lawmakers and widespread public support with getting it across the finish line.

Wednesday, Sept. 14, 2022 at 10:30 p.m. on KPBS TV / On demand now with KPBS Passport! When top predators disappeared from Mozambique's Gorongosa National Park, other animals fell into unusual patterns. Now scientists are reintroducing wild dogs to restore the park's "landscape of fear" and with it the natural balance of the ecosystem.

Watch an expert panel discussion on the effort to develop and deploy safe and effective vaccines against COVID-19 on Friday, Nov. 20, to be live-streamed here at 12 p.m. ET

Defending his handling of the coronavirus pandemic, an angry President Donald Trump on Friday lashed out at reporters and broke with his own health officials on the science of the outbreak.

Airs Wednesdays, Sept. 9 - 30, 2020 at 10 p.m. on KPBS TV+ Sundays, Sept. 13 - Oct. 4 at 10 p.m. on KPBS 2 + PBS Video App

Dr. Peter Hotez is part of a team working to develop a low-cost COVID vaccine that could be distributed globally. "Vaccines are coming," he says. "We have to get everybody through to the other side."