1.8 Billion Years of Earth's Tectonic Evolution in One Incredible Simulation Earth may be 4.6 billion years old, but for the first time, scientists have traced back 1.8 billion years of its tectonic evolution in a groundbreaking new simulation. That covers nearly 40% of Earth's history! Watch as continents drift, collide, and reshape the world we know today. Supercontinents like Pangea (300–200 million years ago), Gondwana (600 million years ago), and Rodinia (1 billion years ago) come and go, w