Nature's Most Amazing Event

High-def film makes for some freaking amazing wildlife photography. Watch as this school of herring becomes trapped between two flocks of birds - one underwater and one at the surface - setting the table for a much bigger predator.

The full program, Nature's Most Amazing Events, aired on Discovery Channel last weekend. It points out the irony that whales, the world's largest animals, depend primarily on teeny-tiny plankton and crustaceans to survive. These in turn depend on precise oceanic water conditions and temperatures.