揭秘地球史上可能发生的重大事件，每次都伴随着生物变革

The history of Earth"s major events involves transformative biological changes， including mass extinctions that shaped life"s格局. From the earliest fossils like algae and sponges to the emergence of complex life forms， oxygenation， and the rise of dinosaurs and mammals， these events demonstrate how life has evolved and Earth"s atmosphere changed over billions of years.