HTML was invented by Tim Berners-Lee in 1991.
Why it is true
HTML (HyperText Markup Language) was created by Tim Berners-Lee at CERN in 1991, together with the World Wide Web. It is the markup language used to create web pages and remains the foundation of the internet.
Source: W3C
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.