The Origin of Birds - Dr. Julia Clarke

Paleontologist Dr. Julia Clarke shares the evidence that connects modern-day birds with dinosaurs in this 19 minute exploration: The Origin of Birds. Also: Archaeopteryx, one of the most important fossils ever discovered. The video belongs to HHMI BioInteractive‘s Great Transitions in...

Marie Tharp: Uncovering the Secrets of the Ocean Floor

In the early 20th century, Alfred Wegener proposed a revolutionary idea: that the Earth’s continents were once joined together, and had gradually moved apart. The idea contradicted almost everything scientists thought at the time, and it took the detailed work of a brilliant cartographer to prove him right.  Conventional...