资讯

The official story is that Dr. James Naismith invented basketball in Springfield, Mass., in 1891. But what about the teenager ...
AMAZING IDEA! INVENTION FOR BICYCLE CHAIN ...
Upcoming Movies and TV shows Rotten Tomatoes Podcast Media News + More ...
Despite the wheel's immeasurable impact, no one is certain as to who invented it, or when and where it was first conceived.
Imagine you're a copper miner in southeastern Europe in the year 3900 B.C.E. Day after day you haul copper ore through the ...
With an odd-looking contraption, he casually transports the equivalent of three times his body weight on a single trip. As he ...
It wasn't that long ago that frames were made out of cast iron or even wood. Today bicycles are made out of exotic materials such as titanium, aluminum, and carbon fiber. Bicycle frames in the 1990s ...
June 3 is World Bicycle Day — a celebration of one of the simplest, most enduring, and joyfully freeing forms of transportation ever invented.