Dopamine: the neurotransmitter associated with pleasure and reward. This will make me sound like a total hippy, but I think sometimes it’s important to remember that happiness is derived from a chemical you produce yourself and not something dependent on other people and things
A bit of an obvious one from me but DNA is my favourite chemical in the world. It has fascinated me since a teenager and I still work with it in one way or another every day.
An extraordinary molecule used by all known living organisms to encode (essentially) life.
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