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I am passed from person to p...

I am passed from person to person but no hands are needed. I often change in this exchange. Always changing never remaining the same. What am l?

Correct answers: 36

The first user who solved this task is Djordje Timotijevic.

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New Year jokes-Optimist and Pessimist

An optimist stays up to see the New Year in. A pessimist waits to make sure the old one leaves.
- Bill Vaughan

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Alexandre-Emile Beguyer de Chancourtois

Died 14 Nov 1886 at age 66 (born 20 Jan 1820).French geologist who was the first to arrange the chemical elements in order of atomic weights (1862). De Chancourtois plotted the atomic weights on the surface of a cylinder with a circumference of 16 units, the approximate atomic weight of oxygen. The resulting helical curve which he called the telluric helix brought closely related elements onto corresponding points above or below one another on the cylinder. Thus, he suggested that "the properties of the elements are the properties of numbers." Although his publication was significant, it was ignored by chemists as it was written in the language of geology, and the editors omitted a crucial explanatory table. It was Dmitry Mendeleyev's table published in 1869 that became most recognized.

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