Are shadows made out of atoms?

Question: Are shadows made out of atoms?
- Keywords:
  atom,
  quirky,
  shadow
Asked by Anna W to Rob, Anna on 19 Nov 2014.
- Anna Scaife answered on 19 Nov 2014:
  
  Hey Anna – shadows are simply caused by something blocking photons. They mean that you can’t see the stuff (made out of atoms!) in that particular place quite so well.

Question: Are shadows made out of atoms?