Will We Ever Find ET?

A concise article on the reasonings and activities of discovery for life existing elsewhere in the Universe.  SETI/Drake Equation/Habitable Zones/Ingredients for life/Evolution and Extinction/Intellegience

Full Article at http://www.pbs.org/wgbh/nova/space/ever-find-et.html

By Lauren Aguirre

The discovery in September 2011 of a distant planet that might be hospitable to life made headlines. But a planet on which simple life could arise is a far cry from a planet where alien intelligence could evolve. And not just alien intelligence, but a complex, high-tech, long-lasting civilization with which we could communicate. Yet for now we’re stuck here on Earth, with what one scientist has called our carbon chauvinism, hard-pressed to imagine how strange the universe might be.

Is there intelligence elsewhere in the universe? It sounds like a simple question, and for most people there’s an obvious answer: Of course. After all, the universe is so big. As the iconic scientist Carl Sagan put it, “there are 100 billion galaxies, each of which contains something like 100 billion stars.” That means there’s an awful lot of real estate out there.

In addition to the staggering numbers, the history of science has shown that every time we think we are special in some way, we turn out to be wrong. The sun does not revolve around the Earth, the sun is not the only star, we are not the center of our galaxy, and our galaxy is not the center of the universe. There may even be multiple universes. Like so many important questions for which there are little data but different ways to examine the question, finding an answer can get complicated very quickly.

Full Article at http://www.pbs.org/wgbh/nova/space/ever-find-et.html


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