100 Mind-Blowing Define Facts

Water might not be wet. This is because most scientists define wetness as a liquid’s ability to maintain contact with a solid surface, meaning that water itself is not wet, but can make other objects wet.

Octopuses don’t have tentacles. They have eight limbs, but they’re arms (for most species). Technically, when talking about cephalopods (octopuses, squids etc), scientists define tentacles as limbs with suckers at their end. Octopus arms have suckers down most of their length.