NASA’s Perseverance rover may have found the clearest signs of ancient life on Mars yet — inside a strange speckled rock in Jezero Crater. | NOVA l PBS

Meet one of the world's leading experts in dinosaur dung. Her research reveals how some dinosaurs survived harsh winter conditions in Alaska: | NOVA l PBS

Research –– and this performing cat troupe –– suggests that cats can be trained if they know what's in it for them. | NOVA l PBS