You probably look at its name every day, but do you know what Google means? If you've ever heard of the term googol, then you might be able to hazard a guess.
Googol is the mathematical expression for the number 1 followed by 100 zeros – and it's also the inspiration behind one of the world's most recognisable companies.
But the tech giant – and its famed search engine – used to be known by a completely different name.
