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In the dark they are found wit...

In the dark they are found without being fetched, in the light they are lost without being stolen. What are they?

Correct answers: 49

The first user who solved this task is Erkain Mahajanian.

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John Rex Whinfield

Died 6 Jul 1966 at age 65 (born 16 Feb 1901).English chemist and inventor who (assisted by James Tennant Dickson) invented a new polyester, polyethylene terephthalate, (1941) from the the condensation reaction of ethylene glycol with terephthalic acid. They were chemists employed by the Calico Printer's Association of Manchester. The patent they filed for in Jul 1941 was delayed by WW II, but eventually registered in 1946. As a textile fibre, it was given the trade name Terylene when marketed in Britain (1947) by Imperial Chemical Industries (ICI), which bought the rights, and for whom Whinfield worked from 1947. When the U.S. rights were purchased and developed by Dupont in America it was known as Dacron. The material remains popular for wash and wear clothing.

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