In practical terms, parallax is the apparent change in spatial relationships between elements in a three-dimensional scene that occurs when we alter our viewing position. Move slightly, and stationary objects located at different distances in the scene seem to shift their positions relative to each other.
When was tea invented? Who discovered caffeine? Legend has it that the first cup of tea was brewed in 2737 B.C. when dried leaves landed in a boiling cup of water served to the Chinese Emperor Shen Nung. From China, the idea of tea spread throughout the world. It was introduced into the United States in 1650 by Peter Stuyvesant when he brought it the colonists inhabiting New Amsterdam (what is now New York). Iced tea was invented at the St. Louis World's Fair in 1904.
It is only natural that James I and subsequent English sovereigns would encourage production of this textile amongst the settlers of Virginia. Chinese legend tells how silk was discovered almost 5,000 years ago by Xiling Shi, the wife of the semi-mythical emperor Huanghi. Walking in the garden, the empress plucked a cocoon from a mulberry tree. The cocoon fell by accident into her cup of tea and she watched as a strong white thread unraveled. However it was discovered, the potential for such a thread was first realized in China, where silk fabric was being produced by 3000 B.C.