oppose. Diego and Shira want to have children but worry they will not make friends, as the other kids are scared of saber-tooth tigers. Sid is about to propose marriage to his girlfriend, Francine, but is dumped by her and laments his solitude.

During Manny and Ellie's wedding anniversary, asteroids strike the place, and the herd barely escapes and takes shelter in a cave. Meanwhile, in the underground lost world, Buck returns a Chasmosaurus