- 252 million years, 90% of all species died off in "just" a 20,0000 year period.
- Researchers looked at the potential of:
- an asteroid strike
- volcanoes emitting carbon dioxide and methane
- However, Dan Rothman (right) of MIT postulated that the assassin was an archaea, Methanosarcina (in the circle), which produced so much methane, that oxygen levels plummeted.
I might add that our stock market is doing boffo. Today, the Standard & Poor's 500 Index closed above 2000 for the first time in history and the Dow Jones Industrial Average topped the all time closing high of 17,138, but settled at 17,106. For the year they are all up:
- Dow Jones 3.2%
- S&P 8.2%
- Nasdaq 9.4%