[MHGinTN]

If the dinos had not been made extinct and continued to change, developing larger brains, think what intelligent life on earth would look like now! ... *X-files music* Reptiloids anyone?

[Lazamataz]

If the dinosaurs had not been made extinct and continued to change, developing larger brains, think what they would look like now.

[Sawdring]

Sleestack comes to mind.