Just how powerful is a dog's sense of smell? Today, search dog Fern is going to test out her senses to see if she can find a canister filled with pork meat in the middle of a lake, under 7 meters of water and mud. Subscribe: http://bit.ly/BBCEarthSub

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New on Earth: https://bit.ly/2M3La96
Oceanscapes: https://bit.ly/2Hmd2kZ
Wild Thailand: https://bit.ly/2kR7lmh

Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of astounding, entertaining, thoughtprovoking and educational natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this.

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