Yes, unfortunately the title was changed automatically by an HN title parser upon submission. It changes references of million to M and billion to B.

But it didn't change your most recent submission?

Isn't this just someone trying to fit in the 80 char limit? Current title is 80 chars, so there's not enough room for the illion.

It did change it, that's how I noticed in the first place. In my case I went back and re-edited the title and that seemed to make it stick to "million" instead of "M."

My brain accepted 2B but then assumed it was a model of reactor. The idea of it being billions of years old didn't even enter :(