At least 4,000 people are going to be really happy if they need to search for something on the web this morning.

They all signed a petition asking Google to create a doodle for Doctor Who's 50th anniversary, and they got their wish.

Google launched its "largest" doodle ever today: a game, all in the name of the anniversary of Doctor Who. 

You can read all about the making of the 'Whodle' here.

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