The “ice-cold Earth” idea is really intriguing. Planets on the edge of the habitable zone don’t get talked about as much, but they might be just as important for understanding how life forms. It’s interesting how each discovery keeps expanding what we consider possible.
It is fascinating to speculate about where else there may be intelligent life in our galaxy. The trouble is, with only one sample —Earth —we have no idea of what the odds of such life developing might be.
Let's suppose the odds of intelligent life developing is the same as being dealt 13 spades in a fairly shuffled deck of 52 cards. The odds against that are about 6.4 x 10^11 to 1, or about 1 chance in 640 billion.
640 billion is more stars than exist in the Milky Way, so if the odds of intelligent life developing are the same as being dealt 13 spades in a bridge hand, we might very well be alone in the galaxy.
Let's suppose the odds of intelligent life developing is the same as being dealt 13 spades in a fairly shuffled deck of 52 cards. The odds against that are about 6.4 x 10^11 to 1, or about 1 chance in 640 billion.
640 billion is more stars than exist in the Milky Way, so if the odds of intelligent life developing are the same as being dealt 13 spades in a bridge hand, we might very well be alone in the galaxy.
With only one sample, we don't know how flukish intelligent life might be.