Scientists have a track record of rating organs' importance before learning their true functions. But the more we learn, the more we realize many of those "useless" parts are actually essential.

The nose is an undeniably important sensory tool. It helps us to breathe and to smell, affects our taste, and may even arouse our memory. We mainly associate our nose with smell, and with 400 ...

Since the dawn of modern medicine the vermiform appendix has seemed to be a completely useless organ. This week, the University of Chicago’s Dr. Leon 0. Jacobson suggested that a use for the ...