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mRNA vaccines are groundbreaking—but the mRNA inside them is fragile. Kathryn Whitehead explains how scientists have created the right "packing material" to safely deliver these to the right cells.

Vaccination rates in much of rural America remain low. But there's one consistent holdout demographic: seniors, many of whom remember lining up eagerly as children to get the polio vaccine.

Pat Maginnis was out in front of the fight to legalize abortion in the 1960s, but few know her name and the lengths she went to.

In rural areas, basic health care can be out of reach. Keller Rinaudo founded Zipline, a delivery company that uses drones to deliver necessary medical supplies within hours, even minutes.

Astrophysicist Erika Hamden spent 10 years building FIREBall, a telescope that reaches the stratosphere and looks for clues to how stars form. Launching it was more challenging than she ever imagined.

Many of us are anxious about climate change, and that's understandable. While no one person can solve this global issue, there are some things that we, as individuals, can play a role in.

Amal is a nine-year-old Syrian refugee. She's also a giant puppet. Theater director Amir Nizar Zuabi discusses how art can deliver a new message on the plight of refugees in his project "The Walk."

President Biden is beginning his European trip by meeting with Pope Francis at the Vatican. These two leaders know each other quite well, and share many of the same concerns.

How hot will the planet get? What nations negotiate at the international climate summit will help determine that. Here are 4 things to know about what's being decided.

Alex and Mitch talk and talk and talk, and then they drive and drive and drive. Even for this show, it's just terrible.