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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.

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.

Climate change is causing ice caps and glaciers to disappear. One animal that the ice melt is affecting is the North Atlantic right whale.

Even as wealthy countries hit 80% vaccination rates, a number of countries have not even vaccinated 1 in 10 citizens. Our interactive map shows the vaccination landscape.

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.

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.

See some of the best photos from the 2022 World Cup's quarterfinal and semifinal rounds. Argentina and France will face off in the final on Sunday, Dec. 18.