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Wednesday, Nov.30, 2022 at 8 p.m. on KPBS 2 / On demand now with PBS Video App. Discover the forgotten heroes who fought for food safety at the turn of the 20th century. Unusual experiments and tireless advocacy led by a government chemist changed the way Americans thought about food, health and consumer safety forever.

Thousands of passengers aboard a cruise ship struck by the novel coronavirus waited anxiously Tuesday for their chance to leave the vessel, even if it meant being shipped to military bases for weeks of quarantine.

"Never before have US journalists been subjected to so many death threats," Reporters Without Borders said in its annual World Press Freedom Index, adding that President Trump "exacerbates" problem.

Electric assisted bicycles are on trails in the national parks. Enthusiasts think that's a great thing, but some traditional riders and environmentalists see big problems ahead.

Some kids seem resilient from the start — readily able, like dandelions, to cope with stress and adversity. But pediatrician Thomas Boyce says biologically reactive kids need more support to thrive.

In this early work from the Hugo Award-winning author, a supernova near Earth kills off everyone over the age of 13 — and the remaining kids turn increasingly to violence as they struggle to rebuild.

Renee Westbrook's one-woman show is worth seeing

It's a pestilence that strikes goats, sheep and other small ruminants in Africa, the Middle East and Asia. It can wipe out nearly an entire herd. Now there's a vaccine campaign to wipe the virus out.

The small spacecraft is set to hurtle toward the sun at about 450,000 miles per hour. Scientists hope it will clear up some big mysteries, such as why the sun's atmosphere is hotter than its surface.

This week's episode focuses on education as San Diego Unified School District begins a new academic year, the Sweetwater Union High School District grapples with a major budget shortfall, and local students sound off on whether they feel safe on campus.