More about the Wheel

Long ago, people realized that heavy objects could be moved easier if something round, for example a fallen tree log, was placed under it and the object rolled over it. They also discovered a way to move heavy objects using an invention archeologists call the sledge. Logs or sticks were placed under an object and used to drag the heavy object, like a sled and a wedge put together.

People thought to use the round logs and a sledge together. They put several logs or rollers in a row, dragging the sledge over one roller to the next.

(Information for this blog was found at Inventors )