An adenine guanine base pair

An excess of left-handed amino acids on the asteroid would imply that life didn't start on Earth. In particular, there was life where Bennu came from, which colonised Earth. Life starting here seems more likely to me

I knew all them

Wadham made a comeback after that though

I met him. He struck me as very gullible. He quit reality before the age of 30 but Cambridge couldn’t sack him. Not sure if they trusted him to teach anything. He certainly did no research

Brian Josephson?

His young adult books from the 1950s, such as Time for the Stars, Citizen of the Galaxy and Tunnel in the Sky, are excellent

Many of these flow from Germ Theory - best discovery ever