One of the most remarkable pieces of equipment designed by Widder is the Eye-in-the-Sea, a unique, unobtrusive camera that sits on the sea bottom and records the never-before-seen behavior of marine animals.

For more than 20 years, the Monterey Bay Aquarium has entertained, educated, and fascinated its nearly 2 million annual visitors with pioneering displays of realistic undersea environments.

In 1960, a giant quake struck near Chile. Six thousand miles away in Hawaii, officials began to broadcast warnings that the tsunami was due around midnight.

(Airs Sunday, May 30) Along her 9,000-mile voyage to nest, our loggerhead tour guide encounters hammerhead sharks, deep ocean tempests, and fishing nets.

(Airs Sunday, December 13) Shark Mountain takes viewers on a dive of a lifetime to reveal underwater creatures unlike anywhere else in the world.

(Airs Sunday, August 23) Explore a haven for some of the most extreme underwater predators.

(Airs Sunday, June 28) Underwater cameraman Bob Cranston explores the remarkable world of marine creatures called cephalopods -- squids, cuttlefish, octopi, and nautili.

Watch the full episode of "Under Antarctic Ice" online now.

Filmmaker Hardy Jones used his camera as a tool for conservation, filming dramatic dolphin hunts and documenting the effects of chemical pollution on dolphins and orcas.

Excerpts from NATURE examine interrelationships between sharks and other species in the marine ecology. Human impact in the ecosystem includes the shark fin industry.