An anonymous reader writes: We may soon be able to obtain easy and early diagnoses of diseases by smell. This week researchers found one odour-sniffing machine was as good as a mammogram at detecting breast cancer — and many other devices capable of spotting other diseases may be on the way.
"The fundamental principle of science, the definition almost, is this: the
sole test of the validity of any idea is experiment."
-- Richard P. Feynman