the silurian hypothesis now this is actually a bit of a play on words it's actually based on the episode of doctor who that had a strange race known as sillurians 00:05:52 that evolved millions and millions of years ago from ancient reptiles that also possess intelligence but then because of the climatic changes on the planet essentially went into a prolonged state of hibernation in order to survive 00:06:04 the inhibitable earth waking up on modern earth and then interacting with the doctor and so because of this episode the scientists behind this paper decided to give it a kind of a tony chick name calling it the silverine hypothesis which by itself comes from a 00:06:17 geological period roughly around 440 million years ago and honestly for me personally this right here represents one of the more important papers or one of the more important propositions when it comes to 00:06:29 the idea of extraterrestrial intelligence because at the moment there's really only two possible answers either we're completely alone and we kind of evolved completely by accident and there's really no other intelligence anywhere out there which makes it a kind 00:06:41 of an evolutionary fluke and it's unlikely to repeat anywhere or anyone in the universe or extraterrestrial intelligence and any kind of intelligence is pretty common and we should be finding a lot of it here on 00:06:54 planet earth in the historical record

DOCTOR: Run like hell, because you always need to. Laugh at everything, because it's always funny. CLARA: No. Stop it. You're saying goodbye. Don't say goodbye! DOCTOR: Never be cruel and never be cowardly. And if you ever are, always make amends. CLARA: Stop it! Stop this. Stop it! DOCTOR: Never eat pears. They're too squishy and they always make your chin wet. That one's quite important. Write it down.