the keynote address is being delivered by george smoot. oh, my god, the george smoot?of course i haven't. george smoot is a nobel prize-winning physicist, one of the great minds of our time. his work in black body form and anisotropy of the cosmic microwave background radiation cemented our understanding of the origin of the universe. it's kind of a funny name, though-- "smoot." it's like talking to a chimp. okay, now that i've been completely insulted, have a good flight. we're not flying. we're taking the train. oh, cool. wolowitz: yeah, cool. seven times as long as flying, and costs almost twice as much. well, then why are you doing it? well, we had a vote. three of us voted for airplane. sheldon voted for train. (glumly): so we're taking the train. don't say it like that, leonard. say it like: "we're taking the train!" ♪ our whole universe was in a hot, dense state ♪ ♪ then nearly 14 billion years ago expansion started... wait! ♪ ♪ the earth began to cool ♪ the autotrophs began to drool, neanderthals developed tools ♪ ♪ we built the wall ♪ we built the pyramids ♪ ♪