Sorry, not on-topic but how were you able to navigate the archive? I can't get to old episodes easily.

I didn’t. I remembered it was a space episode and figured radiolab only probably did a handful. So, I simply googled space and radiolab. After a few misfired links, I came upon the episode. I just remembered it was recent because they talked about the voyager 1 passing the solar winds.

This is one my favorite episode. My eyes become teary every time I listen to this.