How can photon have energy, but no mass if “m=E/c^2” (E= mc^2)

Question

How can photon have energy, but no mass if “m=E/c^2” (E= mc^2)

In: 42

Answer 1

Holy cow! I’m reading the explanations, and there must be some genius five year olds in here.

*mind blown upon seeing plank constant mentioned*

I didn’t understand those equations until I was seven!

*joke*