Friday, September 28, 2012

Microbes on land with no protective ozone

Welcome! "Alien Life" tracks the latest discoveries and thoughts in the various elements of the famous Drake Equation. Here's today's news:
g Abodes - NASA's Dawn spacecraft has revealed that the surface of the giant asteroid Vesta has volatile materials in a broad swath around its equator. See article.
g Life - New research suggests that Earth's early microbes may have been widespread on land, despite the fact that the ozone layer had not yet formed. See article.
g Intelligence - Around 100 billion neurons in the human brain enable us to think, feel and act. They transmit electrical impulses to remote parts of the brain and body via long nerve fibres known as axons. This communication requires enormous amounts of energy, which the neurons are thought to generate from sugar. Axons are closely associated with glial cells which, on the one hand, surround them with an electrically insulating myelin sheath and, on the other hand support their long-term function. See article.

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