Eggs are also valuable; besides their nutritional worth, they are used in their millions to produce our annual flu vaccines, as well as offering a means to explore embryo development and even test theories of how birds evolved from dinosaurs.
Oaklander surmises that itch evolved as a way for humans instinctively to rid themselves of dangerous insects.
Dubbed 'Moments' by Creative Director Alex Breuer (with the pun intended), the idea evolved to be a single piece of content for a user at any given time.
Having evolved to produce more specialist, lighter steels, though, these companies require much smaller workforces.
"An organic way of life that's evolved over all these years is going to be destroyed by a man in a suit because we don't tick the boxes," Cahalane said.
"Our sweet tooth," he says, "is an evolved and instinctual preference for high-energy food.
Across the two areas are about a million pairs of Adélie penguins, more than a dozen species of whale, more than a third of the world's population of emperor penguins, abundant krill and fish species and the Ross Sea region's top predator – the toothfish, which can grow to two metres weighing 200 kilos (they've evolved special anti-freeze like proteins to survive in the frigid waters).
In those intervening years, the country had evolved.
Meanwhile, the Taliban has evolved into a hydra-headed monster in the region.
Recent research has eroded the idea that dreaming only occurs during REM sleep, and that it's a "bottom-up' process", with older parts of the brain activating the more recently evolved ones.
Patricia Hewitt's proposals represent one of the few occasions in which New Labour's talk about the need for tough decisions has evolved into a proposal which challenges the privileges of a vested interest.
