Giveaway: Yellowstone, Battle for Life

America's first National Park, Yellowstone, is home to some of the richest wildlife on Earth beyond the plains of Africa. Available today on BBC Video DVD and Blu-ray release, Yellowstone: Battle for Life follows the intertwining stories of Yellowstone's iconic inhabitants – including America's last great bison herds, the grizzly bear, the grey wolf, and the antelope– as they battle to survive.

Check out our amazing selection of images from the documentary, and leave a comment to be in the running to win the DVD. We'll randomly choose and announce our ten winners here on October 23, 2009. Good luck!

The Grand Prismatic Spring, an Aerial View

The Grand Prismatic hot spring is a deep thermal spring, richly colored by growths of exotic heat-loving micro-organisms. Some believe they offer a glimpse of what the first life on earth would have looked like.Paul D. Stewart/BBC Earth

Volcanic Singe

Yellowstone sits atop a super-volcano and remains geologically very active. Recent changes in the volcanic springs have killed these pines by cooking their roots as the branches above freeze in winter.Paul D. Stewart/BBC Earth

Clepsydra Geyser

A raven flies though steam from Clepsydra Geyser. This geyser erupts nearly non-stop, sending plumes of steam across the Firehole river valley of Yellowstone.Paul D. Stewart/BBC Earth

'Velvet' Antlers

A male Elk, with antlers in 'velvet', feeds in Yellowstone's long summer grass. The 'velvet' that covers a growing set of antlers is actually a highly vascular skin. It supplies oxygen and nutrients to the antler's bone as it forms.Paul D. Stewart/BBC Earth

Rainbow

A rainbow on the lower falls of the Yellowstone River, the tallest waterfall in the park (it's 308 feet high).Paul D. Stewart/BBC Earth

Mountain Shadow

Yellow balsamroot flowers in early spring, seen here in the shadow of the Teton mountains.Paul D. Stewart/BBC Earth

Glacier Lilies

Glacier lilies are amongst the first flowers of the Yellowstone spring, blooming just as the winter snow melts.Paul D. Stewart/BBC Earth

Many Geysers

Another great shot of Clepsydra geyser. It is one of over 500 Geysers in Yellowstone.Paul D. Stewart/BBC Earth

Bison Herds

America's largest remaining wild bison herds graze the broad fertile meadows of the Lamar Valley.Paul D. Stewart/BBC Earth

Male Moose

A large male moose, seven feet high at the shoulder and weighing over 1000 pounds. Moose prepare to fight during Autumn, while they're in a the mating rut.Paul D. Stewart/BBC Earth

Geese

Canadian Geese feeding in a field of autumn grass. Having bred over the summer, they are preparing to leave Yellowstone for the winter.Paul D. Stewart/BBC Earth

Geyser

One of Yellowstone's 500 geysers. Yellowstone has the largest concentration of Geysers in the world.Paul D. Stewart/BBC Earth

Micro-Organisms

Gelatinous mats of micro-organisms color the mineral-rich waters of Yellowstone's thermal springs.Paul D. Stewart/BBC Earth

After the Fires

Trees regenerating after Yellowstone's devastating 1988 wildfires overlook Grand Prismatic spring.Paul D. Stewart/BBC Earth

Lamar Valley

The Lamar Valley.Paul D. Stewart/BBC Earth