Scientists pushed photons across the universe to test the speed of light—and found Einstein’s cosmic speed limit still holds ...
Imagine you’re in a car driving across the country watching the landscape. A tree in the distance gets closer to your car, passes right by you, then moves off again in the distance behind you. Of ...
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The universe’s speed limit exposed and why even light is trapped
The universe comes with a built‑in speed cap, a hard limit that shapes everything from how stars shine to how cause and effect unfold. That limit is usually described as the speed of light, yet the ...
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