Summer in Spring 2012

"This March, we started with twelve days of April weather, followed by ten days of June and July weather, with nine days of May weather predicted to round out the month"
image from Dr. Jeff Masters

North American Megafauna

Stuart (1991). Mammalian extinctions in the late Pleistocene of northern Eurasia and North America.



Saber-toothed cats bringing down a bison, sometime before 14,000 years ago. (credit)


Doughty and Field (2010) Environmental Research Letters. Agricultural NPP in relation to that liberated by extinction of Pleistocene Megafauna.