1. There’s no such thing in science as “RGB rays.”

RGB refers to red, green, blue light channels — a digital/visual concept, not a type of radiation in physics or astronomy.
There are gamma rays, cosmic rays, and UV radiation, but RGB rays do not exist as a scientific phenomenon.

Sometimes this confusion comes from misheard terms like:

  • GRB = Gamma-Ray Burst
  • UV radiation
  • cosmic rays

If you meant GRB, that does have a real scientific discussion behind it.


2. Gamma-Ray Bursts (GRBs) have not been confirmed to cause any mass extinction

Scientists have speculated that a very close gamma-ray burst could potentially:

  • strip ozone
  • increase surface UV radiation
  • stress ecosystems

But this is theoretical only.

No extinction event in the fossil record has evidence pointing to a gamma-ray burst.

Some researchers have suggested the Ordovician extinction might be compatible with a GRB, but:

  • there’s no physical trace
  • no gamma-ray signature survives over geologic timescales
  • the idea is speculative and not widely accepted

So: No confirmed GRB-caused extinction.


3. What does cause mass extinctions?

The well-supported causes include:

  • asteroid impacts (e.g., Chicxulub killing the dinosaurs)
  • massive volcanic events (Siberian & Deccan Traps)
  • rapid climate change
  • ocean anoxia
  • methane release
  • glaciation events

These are backed by rock layers, geochemical markers, fossils, and global sediment evidence.

No radiation event has ever shown this kind of smoking-gun signature.


Bottom Line

There is zero evidence that any mass extinction was caused by “RGB rays” or even by gamma-ray bursts.
It’s an interesting idea that shows up in speculative science and online discussions, but not in the actual geological record.