[Junior]

What I don't understand is, after the dinosaurs were wiped out, why didn't evolution make some more of them.

From what? Evolution only works with what's available. The dinosaurs were gone, so no dinosaurs were available to take their places. Birds and mammals vied for the new niches, with the birds gaining temporary ascendency before the mammals displaced them in most terrestrial ecological niches.

[<1/1,000,000th%]

What I don't understand is, after the dinosaurs were wiped out, why didn't evolution make some more of them?

I'm a dinosaur. My kids say so. ;)