Six Word Stories

Coprophagia is the consumption of feces; many animal species are coprophageous.

(In general relativity, an event horizon is a boundary in spacetime, most often an area surrounding a black hole, beyond which events cannot affect an outside observer. Light emitted from beyond the horizon can never reach the observer, and anything that passes through the horizon from the observer’s side appears to freeze in place.)

The corpus callosum is a structure unique in the mammalian brain (though it is absent in monotremes and marsupials).