That's the Bill Thurston! He's the guy that practically invented low-dimensional topology. He sewed up the entire field of foliation theory, and showed that most knots are hyperbolic. He won the Field's Medal ... he's someone to listen to!
HFS! I just watched the Numberphile video literally today with those two incredible wire memory, oscilloscope display calculators from the 60s. What a phenomenal piece of engineering! Cliff needs his own channel. I could listen to him talk all day.
