reflexes

Sneezing launches mucus at up to 35 meters per second through a trigeminal nerve reflex arc. Here is the real physiology, the genetics of sunlight sneezing, and the risks of holding one in.

Why can't you tickle yourself? The neuroscience of knismesis vs gargalesis, the cerebellum's prediction trick, and why feet/armpits are most ticklish.

Why do we sneeze? The evolutionary biology behind sternutation, from 600-million-year-old sponges to wild dogs voting by sneeze to salt-spitting iguanas.