Part 2/10:
Picture the Earth as a massive jigsaw puzzle; the continents seem to fit together perfectly because they were once joined as a single supercontinent, known as Pangaea, roughly 100 million years ago. This concept, known as continental drift, once met with skepticism from the scientific community. During the early 1900s, the prevailing scientific thought was that continents could not move or shift; rather, many experts proposed that a massive land bridge connected continents like Africa and South America before mysteriously vanishing.