Dazzling Doppler
Wednesday, April 14th, 2004Austrian physicist Christian Doppler discovered the effect of sound waves squeezing and stretching. Engineers are putting the idea to work in important ways.
Archive for April, 2004
Stay hot & cold with a thermos
Wednesday, April 21st, 2004There’s nothing magic about a thermos. It works simply by slo-o-w-ing down temperature changes.
Spies like us
Wednesday, April 28th, 2004The Central Intelligence Agency has a whole division of scientists and engineers, turning out gadgets not even James Bond could pass up.
