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A time of evolution on earth. How old is our earth? Not everybody knows that. Children usually don’t, but there are a lot of adults who are ignorant either. Not everybody is aware of that or takes it as granted, much less that we think of it. How does everything change over the gigantic number of years, and how relative and small is the time in which we are living at the moment? Can we tell from it that today isn’t the final time, and that we have to expect further changes? How many years will be there for us?
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