www.pbs.org - For 25 centuries, the Parthenon has been shot at, set on fire, rocked by earthquakes, looted for its sculptures, and disfigured by misguided...
In 1991, a small Medieval prayer book was sold at auction. Miraculously, some original writings of Archimedes, the brilliant Greek mathematician, were discovered hidden beneath...
www.pbs.org We can't see dark matter, and some skeptics doubt its existence, but many scientists think it makes up 20-some percent of our universe. Astronomer...
MIT physicist Daniel Kleppner explains how matter changes as it is reduced in temperature and nears -459.67 degrees F, or absolute zero. Watch NOVA's "The...
www.pbs.org In The Spy Factory, an eye-opening documentary on the National Security Agency (NSA) by best-selling author James Bamford and Emmy Award-winning producer Scott Willis,...
