Man's first real invention, and one of the most important inventions in history, was the wheel.All transportation and every machine in the world d...
Researchers determined that the specimens are around 195,000 years old.对化石的深入分析使现代人的历史可以追溯到19.5万年以前。A new analysis of bones unearthed（采掘出的） nearly 40 ...
Of the tens of thousands of ships on the ocean bottom, only a handful, less than 1 percent, contain negotiable treasure, such as gold and jewels. Most...
Weighing too much can damage your health, and obesity is a growing problem for both kids and adults around the world.Sleep might be one answer to the ...
Jan.16,2008It can be hard to know what newborns want. They can't talk, walk, or even point at what they're thinking about.Yet babies begin to ...
Most schools ban chewing gum, but in a few years they might consider changing that rule. Why? Scientists are finding evidence that gum chewing may be ...
Cookies, soda, candy, chocolate: It can be hard to resist the temptation of sugary-sweet treats and drinks.But sugar is high in calories, and eating t...
Daniel Kunkle spent most of his time in graduate school playing with a colorful puzzle called a Rubik's Cube. And for 20 years, Jonathan Schaeffer...
Every spring, more than 1,000 high school students from around the world compete for millions of dollars in scholarships and other prizes at the Intel...
June13,2007Entomologists—scientists who study insects—have a real mystery on their hands. All across the country, honeybees are leaving th...