[Upon discovering an abandoned nest]

You know what this is? It's a dinosaur egg. The dinosaurs are breeding.

But Grandpa said all the dinosaurs were girls.

Amphibian DNA.

What's that?

Well, on the tour, the film said they used frog DNA to fill in the gene sequence gaps; they mutated the dinosaur genetic code and blended it with that of frogs. Now, some West African frogs are able to spontaneously change sex from male to female in a single-sex environment. Malcolm was right... Look. [points to tracks in the sand] Life found a way.