Lisa Randall

Very interesting what she has to say about dimensions. I had never even known that there were four! Let alone maybe more. I like her comment that we might just not be physiologically designed to recognize all of the dimensions, we are not able to picture them, but that at some point, we may be able to identify them through experimentation. Her example of the sphere was very good, because I definitely can't picture a 4-D sphere! Crazy to think that gravity could be stronger in a different dimension. This proves Cusa's point correctly that we really know nothing! I wonder how many different dimensions there could be?