The great silence: Just 4 in 10000 galaxies may host intelligent aliens - Space.com
Alien life capable of communicating across interstellar space
might not be able to evolve if its home planet doesn't possess plate tectonics, not to mention just the right amount of water and dry l… [+9939 chars]
might not be able to evolve if its home planet doesn't possess plate tectonics, not to mention just the right amount of water and dry l… [+9939 chars]
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