Why the Universe Is So Quiet
"The universe is ancient and full of planets. But the cosmos is silent. The answer might not be aliens hiding—it may be physics."The silence isn't about life being rare. It's about time, space, and physics itself [citation:1][citation:5]. Civilizations may be common, but their "loud phase" is incredibly short—lasting maybe 300 years before technology becomes quiet and efficient [citation:1][citation:5]. Galaxies are vast, and signals travel at light speed across distances of thousands of years [citation:1][citation:5]. Any two civilizations would need to be close enough and broadcasting at…
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