Physical Constants and Eleven Dimensions
I found Thad Robert's TedX Boulder talk on visualizing 11 dimensions. I found it a very informative take on a very complex subject: quantum spacetime.
Admittedly, he lost me in a few places. But overall, he does well to reconcile natural theories with geometrical and limit constants.
He mentions our need to reevaluate our geometric assumptions in the light of new data. Makes sense to me.
He makes the connection that many of the natural laws are composed of 5 primary forces: