Nathalie Sarraute

In a crazy world where he would get nominated, I'd like to see Obama run against Herman Cain. That would be fantastic. If Herman Cain became president, there'd be a certain sort of morbid curiosity for me.

We see evidence that lakes and forests and wetlands can have different equilibria - so you have a savanna system that may be stable and thriving, but it can also tip over and become an arid steppe if pushed too far by warming, land degradation, and biodiversity loss.