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Did you know that a Pteranodon's skull was as long as a person is tall? It had a long jaw with no teeth. Learn more about this fascinating creature in Pteranodon.

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Did you know that the first children's hospital in the United States was built in 1855? People can get help at the hospital every day of the year. Learn more about this important place in Hospital.

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Everything people can see and touch around them is an example of matter. Matter exists in different states depending on temperature. Learn more in Properties of Matter.

Did you know that some animals sleep through the winter? Winter is the season when Earth is the closest to the Sun. Learn more about this time of year in Winter.

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Did you know that many fire stations have slides or poles? Firefighters keep their fire trucks and tools at the fire station. Learn more about this important place in Fire Station.

Did you know that summer starts on the longest day of the year? In some places on Earth, the Sun stays up for almost the entire summer. Learn more about this time of year in Summer.

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Did you know that the largest library in the world is in Washington, D.C.? Most library users borrow about eight books each year. Learn more about this important place in Library.

Did you know that the oldest school in the United States opened in 1635? Children of all ages were taught in one room in the 1800s. Learn more about this important place in School.

Did you know that the name Ankylosaurus means "fused lizard"? The body of an Ankylosaurus was covered in armor. Learn more about this fascinating creature in Ankylosaurus.