[본문TEXT_1-4과] 중2 동아(윤정미)
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중2 동아 윤정미 4과 본문
The Amazing World of Animals
Animals That Use Tools
People once thought that only humans can use tools. Now, scientists are finding out that many animals can also use tools.
If you go to a Buddhist temple in Lop Buri, Thailand, watch out for the Macaque monkeys. They may come to you and pull out your hair. They use human hair to floss their teeth. If you are lucky, you may see female monkeys that are teaching flossing to their babies. While the babies are watching, the female monkeys floss their teeth very slowly. This way, the baby monkeys learn to floss.
People don’t usually think that octopuses are smart. However, octopuses are very smart, and they can also use tools. They use coconut shells for protection. When they can’t find a good hiding place, they hide under coconut shells. Some octopuses even store coconut shells for later use. They pile the coconut shells and carry them to use later. How smart!
In Aesop’s fable The Thirsty Crow, a crow drops stones into a jar to raise the level of water. You may think this is just a story, but it is not. Scientists who were studying crows did an experiment. They put a jar with water in front of a crow. A worm was floating on top of the water. However, the water level was low, so the crow could not eat the worm. The crow solved the problem just as in the fable. It dropped stones into the jar. If you think this bird is special, you are wrong. Scientists did the same experiment with other crows, and they all did the same, too.
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