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See how Australia's grasslands harbor animals worth worrying about, especially the venomous reptiles that slither among the country's green fields.
Visit with one of Australia's most feared ocean dwellers: The stingray glides through the water, waiting to inflict pain with its barbed stinger.
Which beast has the most vicious bite? It might be the jaws of an ancient creature, a rare reptile's fangs or poisonous spines caught on a fish hook.