Put simply, it's the outcome of a chemical reaction, which humans learned how to make some 400,000 years ago.
That pre-sleep herbal tea may be doing many people a lot of good.
Medicinal chemists are tweaking a natural molecule that can be a deadly poison – a modified version might work as a nonhormonal male contraceptive.
It's like one great big distillery up there.
Research on molecular machines won last year's Nobel Prize in chemistry. Now scientists have figured out a way to get these tiny molecules to join forces and collaborate on real work on a macro scale.
Explosive developments driving the tiniest engines in the world.
Getting tellurium and phosphorus to form a molecule is stupidly hard and not very glamorous. Here's why it's worth the effort.