Earth is completely overrun with humans -- there are billions of us living and dying on this planet, leaving signs of our existence in the soil, atmosphere, and even in space. Are we the first, though?
The post Silurian Hypothesis: What If Humans Aren’t the First Civilization on Earth? appeared first on ExtremeTech.
from ExtremeTechExtremeTech https://www.extremetech.com/extreme/267855-silurian-hypothesis-what-if-humans-arent-the-first-civilization-on-earth
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