Talks from the TEDxCaltech event are gradually coming online. You'll definitely want to check out Scott Aaronson's contribution, which was a clear highlight. (The biggest highlight was the closing jam session featuring keyboard wizard Lyle Mays and Tuvan throat-singer Ondar. You heard right.) Bloggy narcissism demands that I feature my own talk. It was about the arrow of time, with some Feynman thrown in. As usual, the clip is frozen at at point that shows me to best advantage. [embed]http://www.youtube.com/watch?v=WMaTyg8wR4Y[/embed] But just to show it's not all about me, you should also see this talk by awesome undergrad Jordan Theriot. I would have been a puddle of nervous jelly in this venue at that age. [embed]http://www.youtube.com/watch?v=abXzg3QPp_Y[/embed]