Miners may have invented the wheel !

Ancient Mystery Solved?  A long, long time ago, even before ancient Egypt, someone invented the wheel.  But who, when, and where has been a big mystery.  Now, scientists think they have a clue (線索)! They believe miners in the Carpathian Mountains (喀爾巴阡山脈) (that’s in modern-day Hungary) might have invented the wheel almost 6,000 years ago! ...Read More