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antimatter

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Imagine that every object has an invisible twin. As soon as they meet, both disappear in a flash of pure energy.

History

Antimatter was predicted by British physicist Paul Dirac in 1928, while solving an equation that united quantum mechanics and relativity. In 1932, Carl Anderson first saw the positron in cosmic rays.

How it works

When a particle collides with its antiparticle, their mass completely converts into energy according to E=mc². This principle works in a PET scanner: a patient is injected with antimatter, and it 'lights up' tumors.

💡 The positron — the 'twin' of the electron — helps doctors look inside the body using PET scanners, like an X-ray but for metabolism.
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