1 The cochlea, dedicated to hearing; converting sound pressure patterns from the outer ear into electrochemical impulses which are passed on to the brain via the auditory nerve.
The Scoville Heat Scale. The Scoville scale is a measure of the 'hotness' of a chilli pepper or anything derived from chilli peppers, i.e. hot sauce. The scale is actually a measure of the concentration of the chemical compound capsaicin which is the active component that produces the heat sensation for humans.
The very highest ones are not liquid at all. These are capsaicin extracts and are powders or crystals, as pure capsaicin comes in crystaline form. For more information on how the Scoville Scale for hot peppers and hot sauces is determined, read the What is the Scoville Scale article.