Coins: The Circular Design That Survived Centuries

Coins are among the oldest objects humans still use every day. They pass through countless hands, pockets, and purses. They survive drops, scratches, water, dirt, and time itself. And despite thousands of years of technological progress, their basic shape has barely changed. Round. Flat. Circular. This isn’t tradition for tradition’s sake. The circular coin is … Read more

Why Are Manhole Covers Round? The Smart Design Choice Hidden Under Our Feet

You’ve walked over them thousands of times.You’ve driven over them without a second thought.They sit quietly in the middle of busy streets, sidewalks, and intersections. Yet one simple question has puzzled people for decades: Why are manhole covers almost always round? It’s not an accident.It’s not tradition.And it’s definitely not laziness. The round shape of … Read more