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More than 100,000 people in the U.S. need an organ transplant, but there is a shortage of donors. Could the solution be found in pigs? The early success of the first transplant of a pig kidney into a living human points to a future when xenotransplantation could be routine.

Every major American city has a highway tearing through its center. Seventy years ago, planners sold these highways as progress, essential to our future prosperity. Instead, they divided cities, displaced people from their homes and chained us to our cars. Nowhere is this more visible than in Texas, up and down I-35. Where is the off ramp from the highway trap?

The discussion of the climate crisis can be too abstract. Data warns us of an overheated future, but it's hard to communicate the seriousness and the urgency to take action. But look around now and you will see the changes to our seasons and from the accumulating damage from worsening weather disasters—and the people who are being forced to pick up the pieces if they can. Stories from the front line of the climate crisis from small town America

From chicken nuggets to tofu, American proteins have a microplastics problem. Microplastics are tiny pieces of plastics which carry a host of potential health risks.Microplastics are everywhere. A new study has found them where they've never been seen before, sitting deep inside human lungs. We inhale a credit card of plastic every week.

Democracy on Trial is a two-hour documentary that probes the roots of the criminal cases against former President Trump stemming from his 2020 election loss. Amid the 2024 presidential race, the documentary examines the House Jan. 6 committee’s evidence, the threat to democracy and the historic charges against Trump.