Failure of SETI (Search for Extra Terrestrial Intelligence)

SETI looked at only a tiny fraction of the wavelengths and directions. Earth has been around for 4.543 billion years, yet only for the last 50 years or so have we been sending radio signals into space. Our signals have propagated only in a sphere 50 light years in diameter. No one outside that bubble can see them. If we are lucky, we will continue another 100 years before we go off the air. If other planets are like us, they have life, but will emit radio waves only a tiny percentage of their lifespan. A squirrel that dances about making itself known on the forest floor will not be long for this world. I suspect wise civilisations will have the sense to maintain radio silence. To avoid detection, other civilisations will use fibre optics and laser beams for communications.

~ Roedy (1948-02-04 age:69)