Thomas J. Sargent

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.

Short stories are my favorite art form. A good one is compact and complete, a telling little slice of life, capturing a moment in time that - for the character - defines her, changes her, is the tipping point for all that will follow.