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What goes up and down the stai...

What goes up and down the stairs without moving?

Correct answers: 41

The first user who solved this task is Djordje Timotijevic.

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Dan St. Germain: Too Lazy to Kill

I could never be a serial killer because Im way too lazy to follow a pattern. I used to murder women that look like Grandmother but now -- mostly delivery men.

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William Sturgeon

Born 22 May 1783; died 4 Dec 1850 at age 67.English electrical engineer who devised the first electromagnet capable of supporting more than its own weight (1825). The 7-oz (200-g) magnet supported 9-lb (4-kg) of iron with a single cell's current. He built an electric motor (1832) and invented the commutator, now part of most modern electric motors. In 1836, he invented the first suspended coil galvanometer, a device for measuring current. Sturgeon also worked on improving the voltaic battery, developing a theory of thermoelectricity, and even atmospheric charge conditions. From 500 kite flights made in calm weather, he found the atmosphere is consistently charged positively with respect to the Earth, and increasingly so at increased height.«

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