What?  300 million years of evolution?  Maybe in another 300 million, with the growing population of Earth, people will start shrinking.  Each of us will take up less space that way.

I was thinking the way we're going, with everyone texting on their little cell phones or whatever - EVEN WHILE THEY'RE WALKING THROUGH A CROWDED AIRPORT - human arms will shrink until we all have little Tyrannosaurus Rex arms.  I see a lot kids and busniess people doing the chipmunk thing at airports.

-P