Believe it or not, they were found by four teenage boys!
The first one can be seen either way. For me, I saw a vase first. In all of the pictures, the black drawing is considered the positive space and the white background behind it is considered to be the negative space. If you look at the vase picture again and imagine the background to be the black portion, you see two faces.
Hope this helps! :)
Answer:
they want it to have a message
Explanation:
Because it gives the work of meaning
