physical security

A roughly 14-minute interview with OpenBSD founder Theo de Raadt at ruBSD 2013. He talks about making painful changes, getting real feedback, mitigation techniques compared to other OSs, and virtualization.

A ten-minute clip of Richard Feynman describing how mathematicians and physicists differ in their interests and customs. He argues physics rests on visualizing and applying math rather than pure abstraction.

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