Evolution of Life on Calmarendi

It is estimated that stars the mass of Cal A have a life expectancy of around 2.3 billion years. Compare this with Sol which is an estimated 4.6 billion years into its predicted 10 billion year life span.

If we assume that life on Earth began at just about the earliest point in time that it possibly could have (the hypothesis generally accepted by modern science) and that evolution thereafter has progressed at a typical rate for planets that go on to develop intelligent lifeforms capable of forming technological civilizations, then we have a clear problem. Even if we assume that Cal A is close to the end of its existence as a stable, main sequence star (though there is no reason to suppose that it is) then Calmarendi will have had barely half the time it needs for the type of civilization we see there to arise.

One possible explanation might be that evolution on Earth has been far slower than it could have been, perhaps as a result of having encountered multiple setbacks. Another, more stark conclusion, is simply that the life we see on Calmarendi did not arise there.