Places to Know

HANGING GARDENS

A long time ago, King Nebuchadnezzar lived in a land called Babylonia. He married a beau­tiful princess from another land and brought her to Babylon, the capital of Babylonia. The new queen grew…

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How Things Work

Matter forever!

After a log burns in a fireplace, only a few handfuls of soft ashes are left. Most of the matter in the log seems to be gone. But is it really gone? No! It has simply changed into other kinds of…

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How long, how fast, how hot, how heavy?

The birth of the calendar

A year is a long time. So, long ago, people decided to divide it into shorter time periods. About five thousand years ago, the Sumerians divided the year into twelve “moons.” Each moon had thirty…

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