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First, the "snowball earth", despite favoured by many scientists, is not a theory in the scientific meaning of the term, but a hypothesis, because it is not widely accepted: https://en.wikipedia.org/wiki/Snowball_Earth#Scientific_dispute. Some models show sea ice at the equator, while some more sophisticated climatic models failed to form sea ice to the ...


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"According to Darwin, eventually, the fittest will survive" Darwin never said this. Fitness and survival are two separate concepts. In a simplistic version, fitness is measured by reproductive output. Survival is, well, survival. You can have higher output than your brother, but have a lower chance survival. In fact, the very act of producing offspring ...



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