The original post: /r/askscience by /u/waterskier8080 on 2025-01-20 01:24:10.

How long ago did humans and dogs have the same ancestor? If my (limited) understanding of evolution is correct, there theoretically had to been a time where an animal existed that split into what would eventually evolve into humans and what would eventually become dogs.

What was this animal?

Where did it live?

And how many generations are there for each between then and now?