u/kidsindabasement

Hi all! My penny collection consists of mostly pennies I've pressed myself (for example on vacation). However, lately I'm seeing pennies on vinted, ebay, etsy, etc that I really like. Does anyone else buy their pennies? Do you feel like this ruins your collection?

How popular is this field? What do you do exactly if you were to go for a PhD in it (Oxford has this named in one of their research themes)?

Is it even any different from computational (neuro)biology?

Just curious, have never heard of this before.