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 fee...
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...
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 ba...
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 t...
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 weathe...
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 too...
What is Poison Ivy?
Poison ivy is a kind of harmful vince or shrub belonging to the cashew family. It grows plentifully in parts of the United States and southe...
What is Caffeine?
Caffeine is found in a variety of plants, including the leaves of the tea bush and the beans of the coffee and cocoa plants. In the small am...
What is the Skunk's Defense Mechanism?
A skunk is a small furry animal with distinctive black and white markings. It is known for the foul-smelling liquid which it sprays when fri...
Who Were the Franks?
When the Roman Empire collapsed, the Franks emerged in 476 AD, as the dominant force in Western Europe. The 'Franks' were made up of...