Good bye banana?

You may not realize it, but nearly every banana you've ever eaten is genetically identical.  Born and bred to be tasty, ship internationally, and to be resistant to a leaf fungus that almost completely destroyed international banana trade in the 1950s.  This banana is called the Cavendish, and it's now threatened by the same kind of fungus that did in its predecessor, the Gros Michel (which apparently was bigger and tastier).