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.

Scientists have discovered a new organ: a set of salivary glands set deep in the upper part of the throat. This nasopharynx region — behind the nose — was not thought to host anything but ...

Many of us have it surgically removed – as I have done. For years, the appendix has been considered a purposeless organ left over from our evolutionary past without a useful function.