Wes Phillips

You can make an omelet out of an egg, but you can't make an egg out of an omelet. Sean Carroll finds this almost strange, because "the fundamental laws of physics themselves are symmetric and don't seem to discriminate between the past and future."

Have we missed a dimension of time?

Einstein's theories of Quantum and gravity don't mesh—Itzhak Bars thinks there's more to time than we've understand. Space, too, but that's really, really small.