That America is a rich nation is news to no one.  But what might come as a surprise to many is that America also just happens to be one of the richest nations in a different category of wealth:  that of biodiversity.  This, according to Science News, which notes that recent research has uncovered an astounding 100,000 extra species that inhabit our fruited plains.    According to the latest inventory, America now has at least 200,000 plants, animals, and fungi, and the nation boasts the world’s largest populations of  crawfish, freshwater mussels, and fruitflies.  With this impressive total not even including algae and small bacteria, it appears America has more than it reckoned in its hitherto unknown biological bank account.