USEFUL INFORMATION YOU MAY YET TO LEARN

What color is an airplane's 'black box?'
The "black box" that houses an airplane's voice recorder is orange so it can be more easily detected amid the debris of a plane crash.

What's on top of Mauna Kea?
The 4,200-meter-high summit of Mauna Kea, a dormant volcano, on the island of Hawaii hosts the world’s largest astronomical observatory, with telescopes operated by astronomers from eleven countries. The combined power of Mauna Kea's telescopes is fifteen times greater than that of the Palomar telescope in California -- for many years, the world’s largest -- and fifty times greater than that of the Hubble Space Telescope. Since astronomers observe the skies at night and car headlights interfere with observations, it is preferred that visitors drive to the summit area between sunrise and sunset. Daytime visitors are also welcomed.

What happened to Alexander after he died?
After his death, Alexander the Great's remains were preserved in a huge crock of honey. Among the ancient Egyptians, it was common practice to bury the dead in this manner.

Where were the first klompen made?
The first wooden shoe comes from the Netherlands. The Netherlands have many seas, so people needed a shoe that kept their feet dry while working outside. The shoes were called klompen and they had been cut of one single piece of wood. Today, the klompen are the favorite souvenir for people who visit the Netherlands.

How many Concordes were there?
Only sixteen Concordes were ever made, the last in 1980. On New Year's Eve 1994, one Concorde plane carried wealthy revelers on a 32-hour trip to nowhere. These travelers, who paid $23,000 apiece for the trip, rang in the New Year twice because they twice crossed the International Date Line.