Dinosaurs are generally considered tropical animals. So what are their fossils doing north of the arctic circle? Paleontologists battle the fierce climate to find out if the arctic was warmer then than it is now, or the arctic was farther from the North Pole, or the dinosaurs were migratory animals, or if they warm blooded.
A look at the Columbia space shuttle disaster in 2003. It includes interviews with shuttle astronauts, family members, flight control personnel, administrators and investigators. Also included is a brief history of the space shuttle program.
A look at fractal geometry, and how it is found just about everywhere in everything, and how the mathematics of fractals can be used to model and measure such things as mountains, coastlines, telephone line noise and heart rhythm. It also shows how they are used in animation, communications and textile design.
A powerful partnership between science and scholarship breaks exciting new ground in investigating the origins of the ancient Israelites, their faith in a single, omnipotent God and the creation of the Bible.
Thirteen thousand years ago a great tragedy in North American history caused the extinction of 35 species of large mammals. Scientists are divided on whether the cause was climate change or human predation. Nova follows the investigation of the evidence supporting a third controversial hypothesis; comet impact.