Watch: Neil deGrasse Tyson Critiques the Science of The Good Dinosaur

Monday, 23 November 2015 - 12:28PM
Science News
Monday, 23 November 2015 - 12:28PM
Watch: Neil deGrasse Tyson Critiques the Science of The Good Dinosaur
If the asteroid that caused the dinosaur extinction missed, could humans and dinosaurs have lived at the same time? That's the central question of The Good Dinosaur, which comes out on Wednesday, and in this new video, Neil deGrasse Tyson investigates the real science behind this supposition in his typically entertaining way:



Unfortunately, but predictably, it's not exactly likely that dinosaurs and humans could ever have existed at the same time. Since dinosaurs were at the top of the food chain, co-existing mammals evolved to be very small, so they wouldn't be attractive sources of nutrition for the dinosaurs. If the mammals had become much bigger than rodents, dinosaurs would have wiped them out, so the principles of natural selection would not have allowed for humans to evolve if the dinosaurs had never gone extinct.

However, if for some reason, the dinosaurs had been localized to one area of the world, and mammals had been allowed to evolve in a different part of the world, then it's possible that humans could have existed on Earth at the same time as dinosaurs. And then, one day, the two species would come across the oceans and cross paths, "and then the dinosaurs would eat us." 

Happy Thanksgiving!

Via Gizmodo.
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