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Rob Knight, co-founder of the American Gut Project at the University of Colorado in Boulder, works in the lab where the samples are processed.

Behind The Scenes At The Lab That Fingerprints Microbiomes

Inside the lab, a lone technician sorts through new samples, snipping off swab heads intentionally fouled with fecal material. One head goes to cold storage and the other is processed for sequencing.

A row of large stones is seen in this rendering of researchers' discovery beneath part of Durrington Walls, near Stonehenge.

Stonehenge Has A New (Old) Neighbor: Row Of Huge Stones Found Nearby

The newly found Neolithic monument dates from more than 4,000 years ago, researchers say, adding a new wrinkle to the "super-henge" at Durrington Walls.

Using Tor, or The Onion Router, enables users to hide their online activities. Advocates say the network protects the privacy of activists. But prosecutors say it's used extensively by criminals — and is making it harder for law enforcement to do its job.

Prosecutors Say Tools For Hiding Online Hinder Cybercrime Crackdowns

Advocates say tools that cloak online identities are needed to protect activists. Prosecutors say they hinder efforts to police all kinds of crime, from child pornography to illegal gun sales.

San Diego Researchers And Contractors Feel Shutdown Pinch

Federal standoff touches San Diego life sciences industry and military contractors.

The Beyster Family, 2014 KPBS Hall of Fame inductees. From left to right: Jim Beyster, Betty Beyster, Dr. Robert Beyster, Mary Ann Beyster, Lan Beyster, and Mark Beyster.

Hall of Fame: the 2014 Inductees

KPBS recognizes the Beyster Family and Ken Kramer as the 2014 Hall of Fame inductees.

U.S. To Temporarily Halt Funding For Controversial Virus Research

The federal government will suspend funding while it reviews the potential risks and benefits of certain experiments with three viruses: SARS, MERS and influenza.

Who's Protecting Whom From Deadly Toxin?

Last year a scientist said he'd found a new form of botulinum toxin, and was keeping details secret to keep the recipe from terrorists. But other science and public health labs were shut out, too.

FRONTLINE investigates the hidden dangers of vitamins and supplements, a multibillion-dollar industry with only limited FDA oversight. The documentary examines the marketing and regulating of supplements, and cases of contamination and serious health problems.

FRONTLINE: Supplements And Safety

Airs Tuesday, June 27, 2017 at 10 p.m. on KPBS TV

An artist's impression of the superluminous supernova as it would appear from a planet in the same galaxy, about 10,000 light-years away. The exploding star is 570 billion times brighter than our sun.

Record-Busting Star Explosion Baffles Sky Watchers

It's 200 times more powerful than a typical supernova and 570 billion times brighter than our sun. First spotted in June, this stellar monster is wowing astronomers, who wonder what's at its heart.

Does Addiction Treatment Require A Higher Power?

Author Maia Szalavitz argues that it's impossible to destigmatize addiction while also rendering it the only diagnosis in medicine for which the treatment is explicitly moral.

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