It's hard to say, and paychecks prevent a lot of curiosity from becoming action. Genetics alone tells us the standard old theory of pre-chimps to us in a few million years doesn't add up. But, there are also smaller oddities, like soft tissue preservation in fossils, and how evolution actually functions, which we're now able to really look at, at low levels, and simulate, don't quite map to the normal story.

I wouldn't rule out our ancestors and dinosaurs, at this point.