Board Thread:Off Topic/@comment-30530552-20170401005801/@comment-25936766-20170406020840

Here's a small tip based on something I found, if someone can't think of anything:

1-Magnetite is the most magnetic of all naturally-occurring materials.

2-Magnetite = Fe3O4. In other words, of iron and oxygen.

3-There is magnetite in the human brain.