From lobster claws and dog teeth to bee stings and snake fangs, every creature depends on a weapon. But some are armed to extremes that make no practical sense - whether it's bull elks with giant 40-pound antler racks or tiny rhinoceros beetles with horns bigger than their body.

What explains giant tusks, horns and claws that can slow an animal down and even impair health and nutrition? Showcasing astonishing wildlife cinematography, 'Extreme Animal Weapons' investigates the riddle of outsize weaponry and uncovers a bold new theory about what triggers an animal arms race.

In creatures as varied as dung beetles and saber-toothed tigers, shrimp and elephants, the same hidden factors trigger the race and, once started, these arms races unfold in exactly the same pattern.

In this enthralling special, NOVA cracks the secret biological code that underlies nature's battleground.

If you would like to win a copy of this rather enthralling new DVD, just answer this easy question: The elk (Cervus canadensis) or wapiti is one of the largest species within the deer family, Cervidae, and one of the largest terrestrial mammals in North America and Northeast Asia.

However, this animal should not be confused with the still larger _____ (Alces alces) of North America.

But what is that missing word?

Send us your answers and if you're correct you'll be in the running to win one of these new DVDs! Just send us an e:mail here before October 1st, 2020 with your answer and the subject title CONTEST: EXTREME ANIMAL WEAPONS 2 DVDs to: exclusivemagazine@flash.net

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