The oddness of relativity led to deeply weird ideas like black holes, time dilation, and the curvature of space. At this point we have experimental or observational evidence for all of these phenomena — so much so that they can sometimes seem less bizarre than they actually are.
Here’s a cartoon about something else really odd: muons — via Minute Physics
This video is about how terrestrial muons are part of our experimental proof of time dilation, length contraction, and special relativity in general.
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