Re: Interesting times
This was discussed in the August issue of Scientific American. I have a niggling feeling that in a universe with 4 extended spatial dimensions, attractive forces exerted by a "point" like object would fall off in accordance with an inverse cube law rather than the inverse square law in our universe. This would mean that bound structures such as electrons orbiting atomic nuclei and planets orbiting stars are not possible. Not sure about atomic nuclei and the strong and weak forces though.
Unfortunately at this time in the morning my maths isn't up to exploring this further.