Astrophysicist Carl Sagan said that extraordinary claims require extraordinary evidence. If you claim to have found a new species of beetle – 350,000 have already been described – you will only have to present a handful of anatomical data to convince your colleagues. But if what he claims is to have discovered life on Venus, you will have to have a very good grip on your evidence or, otherwise, you will be exposed not only to the sadistic scrutiny of other scientists, but also to making a horrible fool of yourself in front of the entire world. The central question we must ask ourselves in this case is whether the evidence is “extraordinary” enough to satisfy the Sagan's law. They are?
