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Wheels were invented 5,000 yesrs ago in Mesopotamia. They were made from solid wood. Animals pulled carts on wheels. A thousand years later, spokes were added whitch made the wheels much ligheter.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.