YouTube channelWTDhas created a digital animation showcasing the sizes of extinct animals alongside their extant descendants.

Let’s just say that some daunting creatures of today had much more intimidating relatives in the long-since past.

The video begins presenting the nuralagus, a yard-length relative of the rabbit.

animation showing size comparison of polar bear and extinct ancestor

Photo: Screenshot fromYouTube

Things, however, quickly escalate from there.

The same goes for the Emperor penguin.

Some threatening creatures currently in the world make an appearance alongside their ancestors.

animation showing size comparison of crocodile and extinct ancestor

Photo: Screenshot fromYouTube