Thursday, October 20, 2011

When viruses first appeared

When viruses first appeared 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 potential habitability of the nearby star system Wolf 718? See article.
g Abodes - By measuring uranium isotopes in ancient carbonate rocks, scientists have discovered that there was a large shift in ocean chemistry around the time of Earth's largest mass extinction. The study sheds new light on the links between Earth's biosphere and climate. See article.
g Life - Have viruses been around since life first appeared on Earth? To learn about the history of viruses, scientists are exploring whether salt beds and hot springs preserve viral signatures. See article.

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