With input from two Nobel laureates, the curators of an innovative art exhibition in New York state are spotlighting the 10 molecules of the 20th century that have most profoundly altered our world.

A newly designed optical centrifuge allows scientists to control molecular rotation inside superfluid helium nano-droplets.

So, what exactly is quantum theory in chemistry? It’s basically the set of ideas that explain how atoms and molecules behave at a really, really tiny level. Think smaller than you can even imagine.