lot of dinosaur names as well are just being factual about size, like ‘mega’ - and actually a lot of the names are being factual about other things, like triceratops and pentaceratops: that's descriptive. Three horns; five horns. 

HANNAH McGREGOR: Five horns. We're always telling you about the number of horns. And then a lot of them are just like, “We found this in this place.” 

HZ: Yeah. The albertosaurus - 

HANNAH McGREGOR: Albertosaurus!

HZ: - in Alberta. And, mastodon is meant nipple tooth, or nipple teeth. 

HANNAH McGREGOR: …Sorry? 

HZ: You look a little perturbed, 

HANNAH McGREGOR: Perturbed and delighted. Vagina dentata is a sort of recurring theme -

HZ: It's a passion of yours.

HANNAH McGREGOR: It’s a passion of mine! Ha ha ha. Yeah, yeah, you know what? You're not wrong. It's a recurring theme in the book and my life. and so I'm really, I am intrigued by the idea of adding nipple teeth into the equation.