I have no idea.
The whole World's been waiting for such proof since man first thought up the idea. and we are still waiting.

I don't need to prove he/she/it doesn't exist, as you don't need to prove a negative, the same way I don't need to prove that Santa Claus, fairies, or Unicorns don't exist.

I don't go to mythical places with strange men.
-- Douglas Adams, The Long Dark Tea-Time of the Soul.