Posted February 19, 2016 at 10:18 am

I encountered this nifty fact reading Dr. Liben's new, and excellent, paper

Posted February 18, 2016 at 10:36 am
Posted February 17, 2016 at 10:39 am
Posted February 16, 2016 at 10:30 am
Posted February 15, 2016 at 10:52 am
hi