Saturday, March 31, 2012

Understanding ice worlds and our hunter-gatherer predecessors as long-distance endurance athletes

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 - A new study shows that current estimates of ice-giant planetary interiors overstate water's compressibility by as much as 30 percent. The findings could dramatically change our understanding of the physical properties of such worlds. See article.
g Intelligence - In the last century something unexpected happened: humans became sedentary. We traded in our active lifestyles for a more immobile existence. But these were not the conditions under which we evolved. David Raichlen from the University of Arizona, explains that our hunter-gatherer predecessors were long-distance endurance athletes. “Aerobic activity has played a role in the evolution of lots of different systems in the human body, which may explain why aerobic exercise seems to be so good for us,” says Raichlen. However, he points out that testing the hypothesis that we evolved for high-endurance performance is problematic, because most other mammalian endurance athletes are quadrupedal. See article.
g Cosmicus - Quote of the Day: “All civilizations become either spacefaring or extinct.” – Carl Sagan

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