——-Continents look like fit together like puzzle pieces

This observation is known as continental drift or plate tectonics. The theory states that Earth's continents were once part of a single supercontinent called Pangaea, which began breaking apart around 200 million years ago. Over time, the continents have drifted to their current positions, creating the shapes and formations we see today. Scientists have used evidence such as similarities in fossils and rock formations on different continents, as well as the matching coastlines and geological structures, to support the theory of continental drift.