Overview: Being big can have its advantages, but it also comes with sizeable challenges.

Take the world's largest lizard, the Komodo dragon, whose huge appetite means it must take on prey ten times its weight, or the tallest of them all, the giraffe, who with such a long neck must control immense blood pressure.

Natures biggest beasts must go to extraordinary lengths to thrive. For them, size does matter.

DVD Verdict: Also inclusive of the 150-ton blue whale who can suck up four tons of krill a day, to Japan's finger-length giant hornets that can decimate a hive of 30,000 bees to feed on their larvae, nature's biggest beasts are not only put front and center here in PBS's new 'NATURE: Nature's Biggest Beasts,' but their epic survival stories are told too.

Take the Komodo dragon, the largest living lizard in the world. These wild dragons typically weigh about 154 pounds (70 kilograms), but the largest verified specimen reached a length of 10.3 feet (3.13 meters) and weighed 366 pounds (166 kilograms).

Also known as the Komodo monitor, it's a species of lizard found in the Indonesian islands of Komodo, Rinca, Flores, and Gili Motang and as we see, as a result of their size, these lizards dominate the ecosystems in which they live.

Komodo dragons hunt and ambush prey including invertebrates, birds, and mammals. It has been claimed that they have a venomous bite; there are two glands in the lower jaw which secrete several toxic proteins.

Another animal on display here for its size is the adorable giraffe (quite like the cute one found on the cover art). We learn that the tallest giraffe ever recorded was a Masai bull named George.

George stood at 19ft and his horns almost grazed the roof of the 20ft high Giraffe House when he was nine years old. He arrived at Chester Zoo from Kenya in January 1959 and sadly died in July 1969.

It is the tallest living terrestrial animal and the largest ruminant and it is traditionally considered to be one species, Giraffa camelopardalis, with nine subspecies.

Facts like this and oh-so much more are exactly what 'NATURE: Nature's Biggest Beasts' brings to the fore and trust me when I say that it's 55 minutes that you'll never want back! This is a Widescreen Presentation (1.78:1) enhanced for 16x9 TVs.