Discover the diverse uses and types of wax. Wax is an organic compound that is hydrophobic and malleable at near ambient temperatures. Learn about various sources of wax, including plant, animal, and petroleum waxes and explore the wide...

The History of Physics and Its Applications

Common causes of death in ancient Greece and Rome had a lot to do with a lack of modern healthcare and wellness. In an urban society with no central plumbing, impure water supplies that transmitted bacteria, and insufficient medical...

Hanno the Navigator was from an ancient city called Carthage, which was located in North Africa. In the 5th century BC he lead an expedition along the previously unexplored (to those from the Mediterranean) West African coast. This video...

The Chinese calendar has been in use for more than 4,700 years. And it incorporates the Chinese zodiac, the Yin and Yang, the Five Elements, Chinese astrology and much more.



According to this system, this year 2020 is the...

This video provides an overview of iron, discussing its properties, historical uses, and importance as a nutrient in the body. It explains how iron is commonly alloyed with other metals to form steel, which is widely used in...

Take students on a journey to early Native American communities, Colonial towns and early American cities to explore the variety of communities, as they existed in the past. They'll learn how schools of the past are different from their...