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A mysterious die-off of freshwater mussels has biologists scrambling to figure out a cause. Freshwater mussels are critical to river ecosystems and to U.S. water supplies.

This week, HEAL Palestine, a non-profit organization, will carry out the largest known evacuation of wounded children from Gaza to the United States. Co-founder Zeena Salman shares some of the children's stories.

Ismail Haniyeh, a top Hamas political leader, is dead after a targeted raid in Iran, according to the group. And, Simone Biles leads Team USA to win all-round gymnastics gold.

Around 30,000 runners will participate in the Boston Marathon, and that includes some runners with disabilities. We meet a visually impaired runner and his guide as they trained for the race.

The anxieties before the World Cup were many. But with the knockout round set to begin Sunday, it's fair to say: The North American World Cup has been a thrill.

Hundreds of bills passed in the 2021 regular legislative session in Texas become law, including abortion and voting restrictions, a ban on critical race theory, permitless carry and more.

During her remarkable life, Rosalie Sorrels' was adored by Hunter S. Thompson and Studs Terkel, was backed by Jerry Garcia at Woodstock and an early supporter of Townes Van Zandt.

A Black sisterhood of hikers in Colorado now has chapters across the U.S. and Canada, and includes other sports. "Being around nature, it's like grounding yourself," a founder says. "That is vital."

The Rosebud Sioux Tribe is vaccinating its community at rates faster than the rest of South Dakota. That mirrors a trend in Indian Country, which has been hard-hit by the coronavirus.

Insecticides and other chemicals found at the sites threaten long-term damage to ecosystems. California law enforcement, ecologists and others are cracking down.