The Kardashev scale is a speculative model that was designed to explain the scale of difference between humankind and possible alien societies that may exist. “May” is the key word here. 1,022 more words
Tags » Humankind
My answer to the Quora question: Why do most humans still have a deep psychological need to have tribal affiliations?
Tigers have claws, birds have flight, fish can swim. 242 more words