A high-traffic “dinosaur freeway” may have once stretched across a shoreline in what is now Bolivia. Traveling along this busy route were theropods — three-toed, bipedal meat-eating dinosaurs, which ...

Researchers studied fossils, well-preserved remains and even a single fingerprint to solve some of history’s long-standing mysteries this year.

Research shows that giving time, money or support to others is associated with benefits to well-being. But doing so isn’t always beneficial. Dr. Leana Wen explains.