Eight legs, three hearts, and a wealth of suction cups - the octopus is one of nature's most curious creations. Color-blind, it still can mimic multicolored backgrounds, and even use color to communicate. Shy and retiring, these cephalopods are hard to find and study, but Ultimate Guide: Octopus reveals their secrets, with amazing, up-close footage of a creature that prefers not to be seen.

Documentary that reveals the life of ants through graphics, natural history footage and interviews with entomologists.

Documentary about spiders, showing how arachnids jump, spin webs and poison and digest their prey. Covered by only a thin skin, their tiny bodies are extremely delicate, yet their venom can be lethal. The Sydney Funnel Web weighs just four-hundredths of an ounce, but it has half-inch fangs, sharp enough to pierce a toenail, and the most toxic spider venom known to man.