For a while, core and the Earth's rotation matched. Later, the rotation speed of the Earth's core reduced even more until it started moving in reverse direction.

During monsoon season, the winds occasionally cause the water to defy gravity and make the water flow in the reverse direction. Strange, right? Furepe Falls, Hokkaido, Japan Furepe Falls is a ...

In which direction would the wheel turn then, or would it even turn at all? That's the essence of the "reverse sprinkler" problem that physicists like Richard Feynman, among others, have grappled ...