Wilt Chamberlain is best known for the number 100, but on Tuesday he would have turned 77 years old. In honor of his birthday, Sports Illustrated's Andy Gray dug this picture out of the vault and posted it on Twitter. He poses a very serious question:

Wilt Chamberlain would've turned 77 today. Here he is in fourth grade. Can you spot him? pic.twitter.com/ZybwJFUF9I

-- Andy Gray (@si_vault) August 21, 2013 Well, can you? We'll give you two guesses, but hope you'll only need one.

It wasn't easy for Chamberlain growing up as kid because of his freakish height. He talked about it in this interview from 1987.