Google is a global superpower. 

Not only is Google the most-visited website in the world — it also makes Google Android, the most popular operating system in the world. It operates at least 14 massive data centers worldwide.

And on the back of its incredibly profitable advertising business, Google is a $450 billion company.

But it wasn't always that way.

Here's a look at the history of Google, from its roots in a pair of Stanford dorm rooms, to Larry Page and Sergey Brin's attempt to sell the company, all the way through the explosive announcement that Google was becoming Alphabet.