lemon demon

Pierre Sprey, a designer of the F-16 and A-10, explains why he thinks the F-35 will not hold up on the modern battlefield. It is part one of a series of F-35 critique videos.

An extended Fifth Estate interview with Pierre Sprey, designer of the A-10 and a key figure behind the F-16, arguing the F-35 is an over-engineered, expensive failure.

An excerpt from the 1983 BBC series Fun to Imagine in which Richard Feynman describes how he and a mathematician friend counted in their heads in different ways, one verbally and one visually. It shows that people can reach the same goal through quite different mental methods.

Grace Hopper appears on Letterman and uses a foot-long piece of wire to show how far light travels in a nanosecond.