The answer to our previous question is zero cm3. It doesn’t matter what the dimensions of the hole are, if it is a hole then it is empty and does not contain any earth. In theory, you can dig a hole straight down through the earth and come out the other side. However, for this to be considered possible in practice, a lot of concessions would have to be made, such as the earth having the same density throughout, and not having a very hot molten core!

When we do something nice for others, our body releases happiness hormones. So it’s worth it to help someone cross the street, hold the door open or donate to a good cause.

Clefairy was almost the face of Pokémon and was originally set to be Ash’s starter character instead of Pikachu. Due to a last-minute change, Pikachu got the role instead, because of the creature’s popularity.