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Lots of animals use tools. Most live on land, although a few aquatic species are equally resourceful. Octopuses use coconut shells as armour, for example, and some dolphins stick sponges on their ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Stone tools ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Archaeologists have ...