Is there a God? How was the Earth made? Is Kim Kardashian's bum real? Who was the laughing baby sun in the Teletubbies' sky?
The latter is a question which has plagued us for years. And now we have our answer. Enter Jessica Smith - not a former star of Laguna Beach - but a 19-year-old at Canterbury Christ Church University.
Jessica has revealed her former identity
The first year dance education student laid bare her secret past during a game with university friends, where they had to reveal something about themselves no-one else would ever guess.
Hasn't changed one bit
She then used Facebook to spread the news.
"I thought I may as well tell them as I'm going to be spending the next three years with them," the Daily Mail reported Smith saying.
She broke the news on her Facebook profile, saying: "So I've recently celebrated my 19th birthday and after a lot of thought, I've decided it's time to tell everyone.
"I am the sun from Teletubbies. There has been quite a few people pretending to be 'the sun' but only I could tell you the real story."
The student was paid £250 for filming and given a box of toys to take home.