“There is nothing noble in being superior to some other man. The true nobility is in being superior to your previous self.” Probably W.L. Sheldon, US lecturer on ethics (1858 – 1907) rather than Ernest Hemingway.
Wednesday, 11 January 2017
Ultra-low-cost, hand-powered centrifuge is inspired by whirligig toy
A human-powered centrifuge made of paper can generate centrifugal forces of 30,000 g and separate blood into its component parts in less than two minutes.