Dr Sagan often took a shine to certain lab classes and would frequently meet with the 8-10 students of these labs at the local pub, The Palms. He could literally speak for hours and hours about everything space and time worthy. His accounting of ancient cultures and their incorporation of astronomy observation into their cultures was first rate. He’d go on for days about Babylonian culture and, as a pretty well read “secular” Jew (he grew up Orthodox in Brooklyn), knew how the Babyonian Captivity transformed the Hebrew religion is fundamental ways. He was mesmerizing in person, a lot less irritating than the man one observes on the boob toob.