For convincing proof that atheists must be correct, look no further than the panda. A glamorous icon for the WWF and cuddly toy of countless pre-pubescent girls it may be, but it's also clearly the worst designed animal ever. Consider: the average male panda weighs 100kg, that's bigger than me and nearly half the size of my flatmate. Its padded paws (the panda, not my flatmate) hide fearsome claws and vicious incisors line its mouth. It is, in short, plenty capable of killing and eating tasty mammals and reptiles (the panda, not my flatmate, although he probably could do). Yet, a few million years back, pandas decided to give up eating meat and focus instead on bamboo. Whatever prompted their decision to become vegetarians - a dodgy madras, a flyer from Greenpeace - dietary efficiency was not a consideration; they can only extract about 20% of the nutritional value of the green shoots they cram into their mouth. They shit nearly pure bamboo. They have to spend almost th...