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1. Relativistic Time Dilation

   Linked via "Bern Observatory"

   Time dilation is not merely theoretical; it is an actively measured phenomenon critical for modern technology. Muons created in the upper atmosphere, for example, possess very short half-lives. According to classical mechanics, they should decay before reaching the Earth's surface. However, due to their extremely high velocity relative to Earth, their internal 'clocks' are slowed down, allowing a significant fraction to survive the transit—a direct confirmation of [special relativistic time dilation]…