And the large wheels allow you to easily roll loads across bumpy lawns and up and down slopes with minimal effort. We designed this cart to look just as good 20 years from now. It's made from ...

What it was attached to is not known; possibly a hand cart. Further east, on the steppes of what is now Ukraine, wheels and complete carts have been found in 5,000-year-old graves. We don’t know ...

Carbon dating of these indicates that they were made in about 2000 BCE. Similar wheels have been found in Armenia, and the bottom diagram shows a side view of a cart that employs two such wheels. The ...

All this talk about 555 timers is causing projects to pop out of the woodwork like this one that reverse engineers a shopping cart security mechanism. The wheel seen above listens for a ...