There has been a lot of cool stuff posted while I was getting this blog set up. From my Google Reader shared items:
Exotic rocks. There’s an art exhibit in Oakland, California, that includes metamorphic rocks from Maine. Why? Because the schists sound like xylophone keys when they’re struck. I knew there was a reason why I liked hitting metamorphic rocks with my hammer…
Fermi paradox meets the timescale. Why haven’t we been visited by intelligent life? Well, if we had been visited by intelligent life sometime during Earth’s 4.6-billion-year history, odds are that there wasn’t any macroscopic life to greet it. And there’s a good chance that there wasn’t even an oxygenated atmosphere. There are a lot of great ways to visualize the length of geologic time; this is a fun approach to the problem.
The 20 links game. Can you come up with 20 links supporting a statement like “the earth is flat”?
Concern lingers, angers flare at Chaiten and Volcanism and society: what to do about Chaiten? There’s an erupting volcano above your valley. The eruption has been going on for months. Your town has been buried by mudflows. But… it’s home. Do you fight back against the volcano and defend your home, or do you leave? If people won’t leave, what do you do?
How low will it go? The water that goes down the Colorado River is allocated to various states by the Colorado River Compact. Trouble is, the Compact promises more water than the river usually carries. The upper basin states (Utah, Wyoming, Colorado, and New Mexico) want to use the water. What will happen when there isn’t enough water to go around? (Thanks to John Fleck for the link.)