A long-running series in which members of the public sit in a black chair to answer questions on a specialist subject and general knowledge.
Did You Know?
Around 2008, John Humphrys
asked the question 'Which chemical has the symbol Ti?' The contestant gave the correct answer 'Titanium', however Humphrys said that the answer was 'Thallium'. He had misread the lower-case L in the chemical symbol Tl as a capital I. See more
Written by Neil Richardson
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