Sooooo, Earth is plowing through radioactive cosmic dust that rains down to the surface.

But hey, this is me talking, so you know what to do: don't panic! In fact, this is a good thing because it can teach us about our galactic environment.

https://badastronomy.beehiiv.com/p/radioactive-cosmic-dust-is-raining-down-on-earth-s-surface