What exactly is fastest in the Universe and interesting to know why ?
Physicists once tried to chase light - and in doing so, discovered the hidden architecture of space and time.Light seems so ordinary — the flick of a lamp, the glow of the Sun — that it’s easy to forget it carries one of nature’s deepest secrets. At exactly 299,792 kilometers per second (about 186,000 miles per second), the speed of light in a vacuum is the fastest anything can travel in the universe. This is not just a large number — it is a cosmic speed limit, a constant that underpins space, time, and causality itself. Albert Einstein built his theory of relativity around this principle: no information or material object can exceed the speed of light. As he once confessed: For the rest of my life, I want to reflect on what light is. Galileo’s Lantern, Rømer’s estimate Centuries before Einstein, in the early 1600s, Galileo tried to measure the speed of light with nothing more than shuttered lanterns and a stopwatch. He stationed a colleague on a distant hill, uncovered his lantern, a...