Astronomers can tell just how hot the surface of the moon gets. The side of the moon toward the sun gets two degrees hotter than boiling water. The ni...
Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart.You can have days with more or...
When is a horse a pony?Horses are measured in hands：one hand equals 4 inches.The height of a horse is measured from the ground to the highest point of...
"Fingers were made before forks."When a person gives up good manners, puts aside knife and fork, and dives into his food, someone is likely ...
The air-cushioned vehicle is not an airplane, since it does not have wings.It is neither a ship nor an automobile, since it travels clear of sea and l...
An electric switch is often on a wall near the door of a room. Two wires lead to the lamp in the room. The switch is fixed in one of them. The switch ...
Los Alamos National Laboratory scientists are using a new technique to see fingerprints on surfaces that typically make them invisible. The method use...
The latest generation of these ever-smarter garments look like ordinary clothes, assembled together with Velcro that conducts electricity, these piece...
If winning is everything, British anthropologists（人类学家） have some advice: Wear red. Their survey of four sports at the 2004 Olympic Games in Athens sh...
The first true piece of sports equipment that man invented was the ball.In ancient Egypt, as everywhere, pitching stones was a favorite children's...