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Some ecosystems have already been irreversibly altered, scientists say. And climate change is wreaking havoc on human health.

NPR's Sacha Pfeiffer talks with Lauren Whitehurst, a cognitive neuroscientist specializing in sleep, about who in our society doesn't get enough sleep and why that's a problem.

Leaders from tech giants like Google and PayPal say that the password as we know it is dead. So what's the future of authentication online? Apple is implementing fingerprint protection on iPhones, but questions linger about the security and feasibility of biometrics.

Newly released revisions to a well-respected COVID-19 model translates into good news for the United States. The number of Americans expected to die from the coronavirus has been lowered.

NPR's Mary Louise Kelly asks Washington Post reporter Michael Kranish about Michael Bloomberg's history of sexist and discriminatory behavior.

We talk with a NOAA scientist about the Northern Lights, and why their visibility seems to be increasing.

At a recent firearms training session in southern California, a small group of Asian Americans had mixed reactions to acquiring a gun.

Ukraine's culture minister said his country's allies could stop Russia from weaponizing its culture by temporarily boycotting Russian artists, including The Nutcracker composer Tchaikovsky.

NPR's Leila Fadel talks with Secretary of State Antony Blinken about talks in Beijing meant to ease tensions between China and the U.S.

Public health and law enforcement agencies around the U.S. are scrambling to blunt the impact of xylazine, a deadly new threat to Americans who use street drugs.