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ITER’s fusion energy experiments will take place inside the vacuum vessel of a donut-shaped machine called a tokamak.
Saint-Paul-lez-Durance, France — From a small hill in the southern French region of Provence, you can see two suns. One has been blazing for four-and-a-half billion years and is setting. The other is being built by thousands of human minds and hands, and is — far more slowly — rising. The last of the real sun’s evening rays cast a magical glow over the other — an enormous construction site that could solve the biggest existential crisis in human history.
It is here, in the tiny commune of…
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