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NPR (Yuki Noguchi) - Using saliva to detect disease holds promise, but it's not perfected yet

Easier than a blood test, saliva tests have the potential to detect cavities, infections and even cancer. But a lack of insurance coverage and other obstacles stand in the way of wider use.

AXIOS (Russell Contreras) - Overdoses are dropping, but poly-drug mixes are rewriting the U.S. drug crisis

Overdose deaths are falling, but America's illicit drug supply is re-engineering itself into lethal cocktails: fentanyl plus stimulants, sedatives, and novel synthetics that hide in party powders and pressed pills. Why it matters: Those polydrug blends — nicknamed "pink cocaine," "rhino tranq," "benzo-dope" and others — are harder to detect, harder to reverse, harder to message against and can even result in the loss of limbs. - That makes recent overdose declines fragile and public-health victories reversible if policy, testing and treatment don't catch up. - "When we crack down on one drug, the market innovates," Sheila Vakharia, managing director of the Department of Research and Academic Engagement at the Drug Policy…

NPR (The Associated Press) - Trump says he doesn't know if aliens are real but directs government to release files on UFOs

President Donald Trump said Thursday that he's directing the Pentagon and other government agencies to release files related to extraterrestrials and UFOs because of "tremendous interest."