\"Nature porn\" in the high-def world is the equivalent of what the first Nickelodeons to motion pictures in the early part of the 20th century -- endless loops of beautiful waterfalls, leaves blowing gently in the wind and hummingbirds pollinating flowers, all solely for the benefit of dazzling the eye and exciting the senses. No, it's not \"about\" anything, but who needs plot when all you want to do is show off that new high-def TV you just paid six grand for?