By modest statistical estimations, there are 100 Earth-like planets in the universe for every grain of sand on Earth. In our galaxy alone there could be as many as 100,000 intelligent civilisations, assuming that life develops on 1% of Earth-like planets, and 1% of those evolve to become so.
Our sun is relatively young in the timeline of the universe. That, in theory, implies that if intelligent civilisations exist, they would be well more advanced than us. If we think along the lines of our own evolution and advancement, our technological advancements in the last 50 years, the medieval age was 1000 years ago, the first homo sapiens were first documented 200,000 years ago. Could we imagine how another civilisation a BILLION years ahead of us would be?
Why have we not ever heard or seen from them?
Introducing The Fermi Paradox.
Tim Urban talks about The Kardashev scale (measuring the advancement of a civilisation in 3 broad categories, according to how much energy it can harness.), and a list of possible explanations as to why SETI has not heard a peep out of the whole universe. Whether we are the only civilisation in the universe, or not… it can be unsettling either way. To think that the future of mankind (if we make it that long) could find out the answer, makes me want to be alive then!
(Imagine if I lived in the middle ages and wished to be reincarnated in the future. Wouldn’t it be a dream come true to be alive right now, to live so comfortably in such an exciting time?)
Reading through the alternative explanations especially for those who think that there must exists more intelligent life than us in the universe, I can’t help but notice that each alternative is a projection of one’s mentality and outlook on life.