Chemistry
London Dispersion Forces
Quick fact
London dispersion forces are the weakest of all intermolecular forces, but they are responsible for the existence of all condensed states of matter—without them, nothing would ever condense into a liquid or solid.
Why this is interesting
Ever wondered why helium, the lightest gas, turns into a liquid at just a few degrees above absolute zero? Or why even nonpolar molecules cling together? It's all due to an incredibly weak—yet universal—force that arises from nothing more than the jitter of electrons.