I remember reading A Short History Of Nearly Everything by Bill Bryson and one particular rambling that stuck with me was that the Earth had been through something like 7 extinction periods where 99% of all life had been eliminated. It was after all these extinction periods that life evolved to what it is today.
That gives you another perspective--one that shows the possibility of life outside earth is pretty small.
But I wonder if there is some probability that can take both of these factors into consideration.
That gives you another perspective--one that shows the possibility of life outside earth is pretty small.
But I wonder if there is some probability that can take both of these factors into consideration.