Question

What happened during Earth's "Dark Age," or the first 500 million years after it formed? ...​

Answer 1

Scientists believe that another planet collided with Earth during the latter stages of its formation, creating debris that became the moon and causing Earth to melt down to its core.

Answer 2

Question:- What happened during Earth's “dark age” (the first 500 million years) ??

Answer:- It is now believed that during Earth's forma- tion, a Mars-sized planet collided with it, creating a huge cloud of debris that became Earth's Moon and releasing so much heat that the entire planet melted.