Nature and animals have always been popular topics for filmmakers working in the large image IMAX format, largely because of IMAX's striking clarity. This set offers a handful of these kinds of films, and displays why the topic and the format are a rewarding fit. The Secret of Life on Earth, T-Rex: Back to the Cretaceous, Survival Island, Galapagos, Into the Deep, and Mountain Gorilla are each presented in standard full-frame transfers. The image obviously fails to capture the size of the original image, but the clarity is still superior to regular film. English soundtracks are rendered in Dolby Digital 5.1. A smattering of behind-the-scenes featurettes and trailers are scattered amongst the discs.