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I have a single waving hand ...

I have a single waving hand I'm present in places across the land On fairer days, I depart I shorten with a broken heart. What am I?

Correct answers: 38

The first user who solved this task is Djordje Timotijevic.

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Help Me Please

I think I may need professional help...
A chef, a butler, and a maid should do it.

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Radioisotopes exported

In 1947, radioactive isotopes produced from phosphorus-31, arrived at Canberra, Australia, being the first export of radioisotopes from the U.S. They were to be used in Australia's X-ray and medical laboratory. Oak Ridge National Laboratory in Oak Ridge, Tenn., produced the isotopes as a by-product of the chain reaction in a uranium pile. They travelled by airplane via San Francisco, California.

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