A pair of hippos was hanging out in the water of their enclosure in Woodland Park Zoo.  One was facing away from us and was submerged for most of the time.  The other was facing us and was staring in our direction.  The shot I want of a hippo is the large yawn showing off the scary array of teeth that backs up their reputation as one of the most dangerous animals to man.  This guy wasn’t obliging.  They say that humans have a natural reaction to seeing a yawn from someone of yawning themselves.  The people that don’t do this have a higher probability of being sociopaths.  I thought I would try it with the hippo.  Either it knew I was faking it or hippos are sociopaths.  I wonder which it is.