Https://wonderopolis.org/wonder/what-is-earths-core-made-of
This may help you on your en devours. This question truly doesn't make any sense to me... <span />
The planet that takes the least time to revolve the sun is the closest planet so that would be Mercury.
The Grand Canyon is constantly being slowly eroded by the rive that flows within it, and scientist have found evidence that suggest it was cut within the last 4 million years.
