Go to the earth - Go to the earth means to hide from someone so that he/she or they can't find a person. It does not mean to dig the earth and get inside that pit.
1. Indian police chases the Don and he goes to the earth all the time.
2. That thief went to the earth when I was after him last night.
3. Ram has gone to the earth so that his teachers don't ask him to do any work.
4. I had gone to the earth for some reason.
5. That big fish has gone to the earth and we can't find it.