Friday, August 07, 2009

Asteroid and comet impacts in mass extinctions on Earth and protocols should we detect an alien signal

Welcome! "Alien Life" tracks the latest discoveries and thoughts in the various elements of the famous Drake Equation. Here's today's news:
g Stars - What is the habitable zone for the nearby star system GJ 338 AB?
g Abodes - Scientists have long debated the role of asteroid and comet impacts in mass extinctions on Earth. New research may indicate that it is highly unlikely that comets caused any mass extinctions. The findings could have implications in determining the likelihood of globally-damaging impacts in our planet's future. See article.
g Message - The first presentation from the recently completed European Exopolitics Summit is now available for free online viewing. The one hour video presentation covers ten categories of evidence used in ‘exopolitics’, a new field that involves public policy analysis of evidence concerning extraterrestrial life and technology. See article.
g Imagining - Here’s the indispensable book on science fiction aliens: “Barlowe's Guide to Extraterrestrials: Great Aliens from Science Fiction Literature.” Having been out a few years now, it may not be on your local bookstore’s shelves. For a peek inside the book (and ordering information), see article.
g Aftermath - Scientists such as the SETI Institute’s John Billingham and Jill Tarter have taken the lead in planning for the day we might receive a signal from life beyond Earth. Working with diplomats and space lawyers, they have helped develop protocols that guide the activities of SETI scientists who think they may have detected extraterrestrial intelligence. See article. Note: This story is from 2001.

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