The Boeing 747 cruises at approximately 920 kilometres per hour. The three-toed sloth achieves a maximum velocity of 0.24 kilometres per hour when motivated by exceptional circumstances, such as the presence of a particularly attractive leaf. According to the Royal Institute of Comparative Locomotion, this represents a speed differential of roughly 3,833 to one. Yet speed, as researchers at the Cambridge Centre for Absurd Metrics remind us, is merely one dimension of existence.
What follows is a rigorous examination of two entities that have each, in their own way, mastered their environment. One does so by burning 150,000 litres of fuel to cross an ocean. The other does so by growing algae on its fur and calling it camouflage.