earths

200 million years after the supercontinent Pangea decayed into plaques, the Earth formed 7 continents today.

When a meteorite is found to be able to hit the earth, humans can fire a nuclear missile to change meteorite trajectories or destroy it with robots.

Have you ever wondered why stars are visible only at certain times of the year? For example, why the night sky observers in the Northern Hemisphere can only see the Hunter of the