Extraordinary claims require extraordinary proof

 In science you don't start with the conclusion. Science begins with the null hypothesis, that is to say that it is wrong until you prove it and the burden of proof is on the claimant, not on the skeptics or the scientific community to disprove the claim. The burden of proof isn't on me, the burden of proof is on you, the claimant to show me the evidence that you have. Extraordinary claims require extraordinary evidence.