[tantalor]

Explaining the joke to you: Whenever we discover unexpected bias due to sex we usually first assume sexism at work, but that's funny here because ancient megafauna aren't sexist.

[andonisus]

I understand why it might be considered a joke, but it doesn't make sense (and is not funny), because the subject in question is not human.

[gameswithgo]

Is it possible you are too caught up in being triggered about gender issues to find anything funny, anymore?