For more information on this, look up "the red queen". Matt Ridley wrote a fantastic book of the same title, which attempts to explain the phenomenon of Y and X chromosomes "competing" against each other.
I'm going to be honest even with the explanation of studying penguins to see if global warming is stressing them, this still seems cruel. I want to see a scientist in a box barely bigger than himself walking on a treadmill!
Tool use does not separate humans from animals.