News
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Health & MedicineMad cow disease might linger longer
A rare but deadly human illness spread by cannibalism has an incubation period in some individuals of about 4 decades.
By Nathan Seppa -
EarthWarning: Slow down for whales
To protect a major population of right whales, the U.S. government is proposing periodic go-slow rules for big ships passing through the animals' migration routes.
By Janet Raloff -
TechPower Play: Shift from loss to gain may boost silicon devices
By tapping solar cell-like behavior in a silicon optical amplifier, engineers have shown that light-manipulating components made from silicon can become power recyclers rather than power wasters, an advance that boosts prospects for silicon optical devices.