In the 600 million years that our planet has had complex multicellular life, only about 130 of those years has any species here been able to communicate outside

In the 600 million years that our planet has had complex multicellular life, only about 130 of those years has any species here been able to communicate outside the planet. That's .00002% of the time, on a planet with multicellular life. Maybe the norm is that intelligent life lasts a long time and we just happen to be born in the first tiny fraction of humanity. But the observational evidence is that even given multicellular life, intelligence is extremely rare, and there is no evidence at all that it is likely to last very long.