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What was the First Type of Shoe?What was the First Type of Shoe?

The first shoes were probably an early prototype for sandals, with soles made of hide, brak wood or wooven grass which were bound to the feet and ankles with strips of hide. The earliest shoe uncovered by archaeologist, a slipper, was found in Oregon…

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Does an Ostrich Really Bury Its Head in the Sand?Does an Ostrich Really Bury Its Head in the Sand?

The ostrich is rather a strange bird, and there are many interesting and peculiar things about it, but it does not hide its head in the sand! What may have given people this idea is that when an ostrich is frightened, it will sometimes drop to the gr…

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Where was the Great City of the Ancient World?Where was the Great City of the Ancient World?

Babylon was the great city of the ancient world. It was the capital kingdom of Babylonian and of Babylonian empires. Babylon stood on the banks of Euphrates River near the modern city of Al Hillah in Iraq. This location helped Babylon become importan…

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How Long  is a Martian Day?How Long is a Martian Day?

The Martian day, or the time it takes Mars to rotate once on it's axis, is about a half an hour longer than an Earth day. Its year, or the time it takes to revolve once around the Sun, is about two Earth year long. Mars is a relatively small planet, …

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What is a Geostationary Satellite?What is a Geostationary Satellite?

There are two types of weather satellites for long and short-term observations, which together give a complete picture of Earth's weather system. GOES or geostationary operational, environmental satellites remain in 36,000 km over the equator, giving…

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What's Inside a Tooth?What's Inside a Tooth?

A tooth consists of four kinds of tissues. They are (1) pulp (2) dentine (3) enamel and (4) cementum. Pulp is the innermost layer of a tooth. It consists of connective tissue, blood vessels and nerves. The blood vessels nourish the tooth. The nerves …

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