And most kinds of science can be done cheaper and better by unmanned missions (the chief exception being human physiology experiments).

FORBES: Stunning Photos Of The International Space Station

Columbia University's Richard Axel, whose work on mapping the genes and receptors of our sense of smell garnered the 2004 Nobel prize for physiology, said the kinds of experiments revealed this week would not resolve the debate - only a microscopic look at the receptors in the nose would finally show what is at work.

BBC: 'Quantum smell' idea gains ground