What is the definition of Although Light Particles?

"Light particles, oh boy, these are the cosmic circus clowns! They zip around the universe, dazzling with their elegance and speed, yet somehow they're still classified as particles – the very stuff that makes up stars, galaxies, and the mystery of dark matter. But here's the kicker: they're so light they could outsmart Einstein himself, but if they ever cross paths with a black hole, it's like a cosmic game of chess where the pieces are literally going to vanish into thin air!"

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Example sentence: "The physicist stared at the particle accelerator, mind boggling at how these light particles could somehow defy his theories, until he realized the next time he saw one, he'd probably get a bad case of cosmic existential dread."