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When light scatters off light, a photon can briefly turn into a pair of particles, such as an electron and a positron. These interact and annihilate, turning back into a photon. But if heavier virtual ...
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About 80% of the universe's mass is thought to consist of dark matter. Yet, little is known about the composition and structure of the particles that make up dark matter, presenting physicists with ...
About 80 percent of the universe’s mass is thought to consist of dark matter. And yet, little is known about the composition and structure of the particles that make up dark matter, presenting ...
The particles that are in an atom: protons, neutrons and electrons The particles that are in protons and neutrons: quarks The four fundamental forces: gravity, electromagnetism, the strong force and ...
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