Questioning and then insulting before you had the answer was not really wise. Kind of snotty, actually. Private school, right? ;-)
"In the late Pleistocene (~10,000 years ago), there was a rash of extinctions that wiped out most of the large mammals in North and South America . All the horses of North and South America died out, along with the mammoths and saber-tooth tigers. These extinctions seem to have been caused by a combination of climatic changes and overhunting by humans, who had just reached these continents. For the first time in tens of millions of years, there were no equids in the Americas."
http://www.fs.fed.us/rangelands/ecology/wildhorseburro/whb_faqs.shtml
A few years ago it was taught that the third whale with a mother and baby Humpback was a "nanny" female whale. It turns out they are males. Also , the Humpbacks are "gentle giants". Now they know that they fight like hell over the females at mating season, often bloodying the waters. And on top of that, are they not still teaching that man evolved from a monkey?
..about the same time humans prefected "Bravo Sierra"