There's a word for that.
Wondering about the end of the world? Well, there’s a word for the study of that. (Anytime you read “ology” on the end of something it means the “study of,” or branch of knowledge.)
So here’s a handy word when it comes to the end of days:
Eschatology means the study of the end of days, the end of life, or the furtherest point of existence. For example, right before the bell rings during 7th period. On a Monday afternoon.