[HardwareLust]

I thought photons didn't have any mass?

[AnimalMuppet]

No. But they do have energy, and that creates gravity in general relativity (if I understand it correctly).

But also, you could have a Zeno's Paradox of particles - one with half the energy, one with 1/4th the energy, one with 1/8th...

[pmdulaney]

To be clear, I personally did think that electrons had a non-zero mass, so my bad.

[maxerickson]

Do they even exist?