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Using chemicals to control bugs or mold is common among commercial cannabis growers. But with no federal oversight, experts are concerned growers may be using dangerous pesticides.

Growing Concern Over Unregulated Pesticide Use Among Marijuana Growers

Regulators in the 23 states where medical or recreational marijuana is allowed are having a tough time making sure pot buyers don't ingest harmful pesticides.

Sabrina German, a research associate with Primordial Genetics, works in the laboratory in this undated photograph.

San Diego Hosts World's Largest Biotechnology Convention

San Diego and its biotechnology industry takes center stage on Monday, with more than 15,000 biotechnology professionals here for the annual BIO International Convention.

Sen. Bernie Sanders in his office in 1981, shortly after becoming mayor of Burlington, Vt. He once said his tenure as a socialist mayor is evidence people are willing to accept radical change.

Exactly What Kind Of Socialist Is Bernie Sanders?

Socialists are a very rare breed of political animal in this country. There's just one in Congress — Vermont senator and presidential candidate Bernie Sanders.

Rebel Brew: What The Boston Tea Party And The Mad Hatter Had In Common

This week marks the 242nd anniversary of the Boston Tea Party. This year is the 150th anniversary of Alice in Wonderland. If you'll follow us down the rabbit hole, you'll find some surprising links.

The NASA Orion space capsule atop a Delta IV rocket, in its first unmanned orbital test flight, lifts off from the Space Launch Complex 37B pad at the Cape Canaveral Air Force Station, Friday, Dec. 5, 2014, in Cape Canaveral, Fla.

NASA's Orion Splashes Down After Historic Test Flight

'There's your new spacecraft, America:' NASA's Orion splashes down after critical test mission.

Upon injury, juvenile jellyfish reorganize their bodies to regain symmetry.

Instead Of Replacing Missing Body Parts, Moon Jellies Recycle

If a starfish loses a limb, a new arm buds and grows in its place. But young moon jellies have a different strategy for self-repair: Existing limbs rearrange themselves to regain symmetry.

California Community Colleges Chancellor Brice W. Harris speaks with students in the cardiovascular technology program during a tour of training facilities at Grossmont Community College, June 19, 2013

Grossmont College To Offer Bachelor's Degrees In Nursing

A separate state pilot program will allow community colleges to offer four-year degrees in selected academic areas.

#NPRreads: Lying About 9/11, And California's Drought-Stricken Levees

Also this week: What Hurricane Katrina and its aftermath teaches us about the true nature of America.

After a quick swipe and online registration, these test tubes were ready to ship back to the lab at the University of Colorado in Boulder for sequencing and analysis.

To Get To The Bottom Of Your Microbiome, Start With A Swab Of Poo

To find helpful patterns in personal microbe populations, scientists also need to gather a long list of information about the people who serve as homes for the microscopic critters.

Engine fan blades waiting to be assembled to engine.

Raw To Ready: Komatsu (New Series Premiere)

Airs Wednesday, October 16, 2013 at 10 p.m. on KPBS TV

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