When you look around the universe you live in, it looks like a 3D space, just like the surface of the Earth looks like a 2D space. However, just like the Earth, if you were to look at the universe as ...

This is likely why some people in the past believed the Earth to be flat. But most people now know that is far from the truth. You live on the surface of a giant sphere, like a beach ball the size ...

This is likely why some people in the past believed the earth to be flat. But most people now know that is far from the truth. You live on the surface of a giant sphere, like a beach ball the size ...