The Earth was formed at the same time as the sun, about 4.6 billion years ago. Earth is our home planet. Scientists believe Earth and its moon formed around the same time as the rest of the solar system. The Hollow Earth is a pseudoscience concept proposing that the planet Earth either is entirely. Earth is made up of land, air, water and life. Mountains, valleys and flat places make up the land. The air is made of different gases. One of the gases is oxygen.
9Apps 4.9
