Researchers find that we can distinguish more than one trillion odors. Now, is that much or not?
Out of a set of 128 basic odors (I only depicted 100 boxes here), 10 (as shown here), 20 or 30 were mixed so that test persons could compare the smell of different mixtures. Two entirely different sets of flavor compounds were easy to distinguish (left), but if a substantial part of the compounds were identical (violet squares) it quickly becomes difficult to sense a difference (middle) or at about 90% overlap mixtures can not even be distinguished at all (right).… Read the rest
