Scientists finally figure out how Post-Its work.

The science nerd in me is fascinated by the ongoing mystery of adhesives; the 12-year-old in me though snickers at "liquid stickiness." *snort*

From Live Science:

Recently physicists discovered there are two distinct ways for adhesives to release their grip, with no middle way and no smooth transition. A sticky substance can either act like a liquid or like a solid, it turns out.

"The goal of the study was really to try to understand the intermediate state between what happens when you have a sticky liquid and when you have a sticky solid," said researcher Costantino Creton, a physicist at the École Supérieure de Physique et Chimie Industrielles (ESPCI) in Paris. "We found there was no real continuous transition in behavior but a very sharp change from a very solid-like behavior to a viscous fluid behavior. We were surprised that there was no intermediate regime."

Viscous fluid! *giggle giggle snort*