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Re:Ask HN: What has melted your brain recently? by Viliam1234 on Thursday June 16, 2022 @07:59PM (#31772454)
Relativity: from our perspective, light moves at 300 000 km/s; from light's own perspective, it actually moves at infinite speed.

Which by the way is a reason why you can never reach the speed of light; because it would mean reaching (from your own perspective) an infinite speed, and you can't do that by burning a finite amount of fuel.

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