The orca shames us all, food-chain wise; humans and pigs are on the same level

[youtube=http://www.youtube.com/watch?v=00-Ivz--SHE&w=600&h=315]

There's a lot going on right now with orcas (killer whales), almost none of it very good. ("Nature gets revenge on man.") Here's some moderately good news for the species, I suppose: they're now, officially, all the way at the top of the food chain, up there with polar bears. The true focus…