Asked by: Henry Sykes, via email
The asteroid strike that killed off all dinosaurs (except for birds) took place 66 million years ago. We know that many species of dinosaur were still thriving at that time. These included small, fast, deadly ‘raptors’ such as Velociraptor, which had big brains and keen senses, and were probably as smart as dogs and cats are today.
If they didn’t die, but instead kept evolving, they may have developed even bigger brains and keener senses. And given millions of years of evolution, perhaps they would have taken the path of primates, eventually developing tool use, sophisticated communication, and even complex societies. We’ll never know, but it’s theoretically possible!