Primates first appeared around 65 million years ago.
The earliest dinosaurs arose over 200 million years ago.
Therefore, it is possible that by about 130 million years ago, the dinosaurs would have reached our level of development. They could have detected the oncoming asteroid, built space ships, and left this planet. All while mammals were barely getting started.
This extremely likely scientific theory is explored in Hibbett, MJ's "Dinosaur Planet"
Perhaps, but one big problem is the rocket equation: dinosaurs are generally very large compared to humans, so they'd need huge spaceships to carry them, and as we know, the rocket equation means you need far more fuel to lift an amount of mass to orbit. Perhaps only some smaller species of dinosaur evolved into an intelligent civilization.
Er? Do you really think professional scientists would write an epic prog-rock musical about the dinosaur invasion of Norwich if they weren't extremely certain of their hypothesis?
The earliest dinosaurs arose over 200 million years ago.
Therefore, it is possible that by about 130 million years ago, the dinosaurs would have reached our level of development. They could have detected the oncoming asteroid, built space ships, and left this planet. All while mammals were barely getting started.
This extremely likely scientific theory is explored in Hibbett, MJ's "Dinosaur Planet"
http://www.mjhibbett.co.uk/dinosaurplanet/nindex.php