Binary digits radioed at star cluster 25,000 light years away; contained semiprime #, atomic #s of hydrogen, carbon, nitron, oxygen, & phosphorus (DNA's elements), other DNA-related data, graphics of human, solar system, Arecibo telescope...
With billions of planets capable of supporting intelligent life, why no visits to earth? This is "The Fermi Paradox." Any civilization, with modest rocket tech & immodest funds, could rapidly colonize the Milky Way...
Extraterrestrial life should be common. Discussing this with colleagues over lunch in 1950, physicist Enrico Fermi asked: "Where are they?" or "Where is everybody?" The paradox is between evidence for its likelihood, and lack of evidence for its existence
