Saturday, October 24, 2009

Lowly algae causes mass extinctions and history of SETI

Welcome! "Alien Life" tracks the latest discoveries and thoughts in the various elements of the famous Drake Equation. Here's today's news:
g Life - Supervolcanoes and cosmic impacts get all the terrible glory for causing mass extinctions, but a new theory suggests lowly algae may be the killer behind the world's great species annihilations. See article.
g Intelligence - Over-expressing a gene that lets brain cells communicate just a fraction of a second longer makes a smarter rat, report researchers. See article.
g Message - Want to get a sense of SETI’s history and varying projects? Jodrell Bank Observatory offers an easy to follow yet informative primer.
g Learning - In past entries, I’ve noted a neat science fiction alien reading list from Prof. Joan Slonczewski, who taught “Biology 103: Biology in Science Fiction” at Kenyon College in 2003. Her students, using astrobiological principles, attempted to create a number of plausible alien civilizations and worlds as a class project. One of the projects was a “biology bedtime story” for kids, “Ellie and Oscar’s Trip”.
g Aftermath - In our everyday lives, we sometimes emulate computers, though typically without their full precision. When we do a favor for someone, more often than we’d like to admit, we keep an informal tally of who owes us, and how much. According to sociobiologists, who attempt to explain behavior in terms of its value for survival, such calculations might have a biological basis. And as we will see, they may also provide some clues to communicating with life beyond Earth. See article.

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