An argument often given for why Earth couldn't host another form of life is that once the life we know became established, it would have eliminated any competition through natural selection. But if another form of life were confined to its own niche, there would be little direct competition with reg
“The modern meaning of life's end-when does it end? How does it end? How should it end? What is the value of life? How do we measure it?”
“I'm no hero. Heroes don't come back. Survivors return home. Heroes never come home. If anyone thinks I'm a hero, I'm not.”