The atheists have nothing to prove; they are not attempting to prove anything. That's why they are showing no proofs. This is (to borrow a term from our erstwhile western colonial cousins) 'Burden Of Proof 101'.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'