Sugar is the most important molecule on earth. You may think water deserves this title. I get it. Water is really good at dissolving other molecules and carrying them around, both inside our bodies and out in the world. Water lets chemicals bump into each other and then do interesting things. But calling water the Best Molecule is like giving paper the award for Best Book. Water is the medium, a backdrop. Sugar is fuel. It’s the gasoline in our tanks, the molecule that stores the energy that we living things use to stay alive. (And unlike actual gasoline, sugar is water soluble, so our
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