Art by Jay Marvel!

The Prehistoric past of the Cenozoic era. A time of danger, fear, and survival, where you fight, hide, and live every day. And yet, in a world where you fight to survive, you can do more - you can live! Especially when you find a feral cave girl (and her family if you want), out in the wilds hunting, or hunkered down in a cave. So, what will you do?~

(mainly focusing on the plot of Croods 1, but 2 may have some references and mentions.)