Finally, it's all been explained.
Sure, there's some big words in this video, but to know that you cry because an onion aborbs sulphur from the ground when it grows, is pretty awesome knowledge to have around the playground!
And next time your dad or mom sheds a tear (or many) while chopping everyones favourite pizza topping, at least you'll know it's not because of anything you did!!
So, with that, here's the 'chop-chop' lesson on why onions make us cry when we cut them.