I thought the sea star 'melting' was a problem related to acidification?

[Recursion]

53. Sigh. Modern physics 101, lecture 3: particle/wave duality

Photons, like all other particles, exhibit characteristics of particles and waves.

Gamma rays are not particles

Gamma rays are photons, which makes them particles. Alpha rays are helium nuclei, which also makes them particles. Both are traveling fast enough that they also exhibit wave-like characteristics fairly clearly.

Also, both can be found pretty easily in nature, so I'm still not sure what you mean by "man-made".

It is most deadly when you eat it or breath it and it gets in your body and bombards nearby cells.

You've made this mistake several times before, but I want to point it out again. You are confusing the radiation itself with the radioactive matter that emits it. You can't "eat" an alpha particle because it's travelling at relativistic speeds. You can eat a substance that emits alpha particles, and that can be very bad news.

But really, seriously, if you care about this as much as you seem to, you should learn the difference between radiation and radioactive material, because this isn't the first time I've seen you mix them up like that.