Antimatter acts as both a particle and a wave, just like normal matter. Researchers used positrons—the antimatter equivalent of electrons—to recreate the double-slit experiment, and while they've seen quantum interference of electrons for decades, this is the first such observation for antimatter.

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Antimatter acts as both a particle and a wave, just like normal matter. Researchers used positrons—the antimatter equivalent of electrons—to recreate the double-slit experiment, and while they've seen quantum interference of electrons for decades, this is the first such observation for antimatter.