It is very important to have a good sleep every night. If people do not have enough sleep, they get sick, and have accidents.
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It is very important to have a good sleep every night. If people do not have enough sleep, they get sick, and have accidents. |
Children need to sleep longer than adults, because they are still growing. How long should you sleep every night?
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Up on the space station, the astronauts tie themselves to a wall, and sleep standing up. They can do this because they do not weigh anything in space. |