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15 remarkable animals that use tools

By: Bryan Nelson on Oct. 28, 2009, 10:09 a.m.
Two bottlenose dolphins play with a sponge

Photo: Yann hubert/Shutterstock

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The intelligence of dolphins is well-known, but since they have flippers instead of hands, many experts didn't think they used tools. At least not until 2005, when a pod of bottlenose dolphins in Australia were seen tearing off pieces of sponge and wrapping them around their noses, apparently to prevent abrasions while they hunted on the sea floor.