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This isn't the first big vaccine rollout, and the past holds lessons for the pandemic present. Here's a look at how the polio vaccine overcame U.S. hesitancy.

The EPA plans to phase out hydrofluorocarbons, or HFCs, which are used in refrigerators and air conditioners. When HFCs are released into the atmosphere, they are extremely good at trapping heat.

Nicole Lynn Lewis felt overwhelmed and isolated as a young single mom in college. Now she runs a nonprofit designed to help teen parents get the financial and emotional support they need to thrive.

A year ago, COVID-19 cases in children made up less than 3% of the U.S. total. On Monday, the American Academy of Pediatrics said children represented 22.4% of new cases.

Featuring interviews with leaders and emerging voices, we look at the last 50 years of NPR, examine its historical weak spots and hear how change is being made in the present and decades ahead.

The new ceiling for refugee admissions will be 62,500 — far above former President Donald Trump's cap of 15,000. Advocates had been concerned Biden was not moving fast enough on a campaign promise.

Exploding cigars. Poisoned pens. The CIA had lots of failed plots to kill Cuban leader Fidel Castro. But the first such plan was directed at his brother Raúl, who just retired at age 89.

The trial is about one app developer, Epic Games, but the outcome could have far-reaching consequences for Silicon Valley and the future of how money moves on smartphones and other devices.

As of the end of April, only 254 deaths were attributed to COVID-19 in Haiti over the course of the entire pandemic. Why has the death rate been so low?

Ecologist Suzanne Simard says trees are "social creatures" that communicate with each other in remarkable ways — including warning each other of danger and sharing nutrients at critical times.