But if it can't be reproduced, it's not science. If there's no doubleblind, it's not science.
Another way you can tell real science from junk is the way the scientist qualifies his assertions. For instance, pharmeceudical studies are mazes of qualifications--that's because if the lab manager makes assertions too boldly, his medicines will kill people and his career will be over.
But the Carl Sagans and paleantologists can make such "it is understood that Nellie Neanderthal got a divorce from Hymie Sapiens oh...hans vavink in air...about ten million years ago." Who's to say the divorce didn't take place?