There is a certain empirical logic that secures lithium’s place as one of the six key members of the Material World. This is a magical metal: alongside hydrogen and helium it was one of the three primordial elements created in the Big Bang, making it one of the oldest pieces of matter in the universe. No other element has quite the same combination of lightness, conductivity and electrochemical power. No other metal is quite as good at storing energy. So light it floats in oil, so soft you could cut it with a kitchen knife but so reactive that it fizzes and bangs when it makes contact with
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