That's all very interesting. Science is defined by observation, and there is no recorded observation for the millions of years, etc., which makes it all just everyone's best guess. Most people can't make an accurate portrayal of events 100 years ago, much less the supposed millions of years ago. Who can hope to authoritatively state such a record?
I remember looking into carbon dating a while back, and the margin for error is apparently astronomical. As a dating mechanism it has more questions than answers, yet it was taught as the standard for my entire school tenure.
Anyway, don't know how all this landed under the topic of humor, so, uh, here's a quick joke:
What is green and has wheels?
Grass. I was lying about the wheels.