When matter and antimatter meet, they destroy one another into nothing. But I thought matter could not be created nor

Question: When matter and antimatter meet, they destroy one another into nothing. But I thought matter could not be created nor destroyed?
- Keywords:
  antimatter,
  create,
  destroy,
  matter
Asked by Ayrton to Ed, Kerrianne, Nina, Oli, yoyehudi on 6 Nov 2017.
- Kerrianne Harrington answered on 6 Nov 2017:
  
  Good question! Very thoughtful!
  
  Energy and matter are equivalent (you might have seen E=mc^2 around, which expresses this). So you could also say energy cannot be created or destroyed. When antimatter and matter come together, the total mass energy is conserved. A lot of the time they emit gamma ray photons.

Question: When matter and antimatter meet, they destroy one another into nothing. But I thought matter could not be created nor destroyed?