hands-free handheld phone driving performance distraction

Hands-free phone calls distract drivers too

Drivers perform worse while talking on a phone whether they hold it or use a hands-free system. This suggests that much of the danger comes from the mental work of having the conversation, not simply from holding the phone.

The Soviet biological weapons program operated on an industrial scale

Up To 65,000 People

The Soviet biological weapons program was enormous. Its civilian-cover organization, Biopreparat, ran 40–50 research sites for military work, and the full program employed as many as 65,000 people. It could produce biological weapons in huge amounts, including about 100 tons of smallpox material per year.

Ancient gears tracked the planets

Built around 80 BC, the Antikythera mechanism used a complex system of gears to calculate the movements of the planets. Its design challenged the old belief that such advanced gearing appeared only in the 16th century.

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hands-free handheld phone driving performance distraction

Hands-free phone calls distract drivers too

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