The Heterotic String

In 19 84, the heterotic string was discovered. It immediately set off an explosion of interest. So we should probably stick to a, what's happening in 19 84? Id sort of work our way up to that. O, i just want o sort of give you a little e, a, sort of a whet your appetite for what comes. A, and so we have to come back to one of the a additional features of string theory, which his extra dimensions.