[Lazamataz]

The problem with light being massless is the lensing effect. If light is massless, then why does it bend around galaxies?

Well, that one is easier to explain. Spacetime itself is warped by gravity. The light, still massless, is changed in direction by that warping.

[Openurmind]

“The light, still massless, is changed in direction by that warping.”

But is it truly massless? What can we measure photons against to know for sure?

https://arvinash.com/why-no-one-knows-if-photons-really-are-massless-what-if-they-arent/

[Political Junkie Too]

What if the edge of the universe is warped, too? What if the universe is one giant bowl in every direction instead of one giant sphere around a common center?

What if light is simply climbing up the side of a bowl?

-PJ