A report on the BBC News website claims that polar bears’ skull sizes have decreased by between 2 and 9 per cent over the last century.
The report blames “physical stress”, and quotes the lead scientist as saying “Because the ice is melting, the bears have to use much more energy to hunt their prey”.
I have read that sentence a couple of times, and there is only one possible meaning. The bears are running around more, and as a result their heads are smaller.
In other words, exercise makes your brain shrink.
So I no longer feel envious of Tinson1 as he gets up at 6.30 to do his morning run. I’m no longer embarrassed by my flabby abs, my fecky pecs, and my abundance of moobs (the fact that I’ve a pacemaker means that I have three). I’m no longer ashamed of the fact that I’m not a member of a gym.
In fact, I feel quite big-headed about it.
Worth Doing Badly 
Hmm. I think it might have more to do with not getting enough fatty acids, from lack of food.
We’ve throroughly and totally screwed the polar bear, I have to say. Go superior beings, with our dominion over the earth!
Moobs.
*giggle*