5 ms·
Two issues: 1. Water covers ~70% of the Earth's surface. Whales migrate of course but can exist from the poles to the equator; 2. Of the 30% land, for pretty
by cletus 6y ago
Two issues:
1. Water covers ~70% of the Earth's surface. Whales migrate of course but can exist from the poles to the equator;
2. Of the 30% land, for pretty much any species, some portion of that is uninhabitable. Dinosaurs being reptiles likely require hot and wet environments. As predators, T. Rex would be limited by where their food could live too.
The dinosaur era was largely one of a super-continent (Pangaea). A good portion of that was likely too cold or too dry to support such a large predator.
- Sharlin 6y agoNote that Pangaea had already started breaking apart a hundred million years before Tyrannosaurus rex, which lived right at the end of era of non-avian dinosaurs. Indeed T. Rex is much closer to our time than Pangaea was to T. Rex's time! They lived in what is now Western North America, but was then an island continent called Laramidia [1] so yes, they were geographically quite limited. [1] https://en.wikipedia.org/wiki/Laramidia https://en.wikipedia.org/wiki/Laramidia
- Keysh 6y agoMany dinosaurs were warm-blooded; fossils of dinosaurs have been found in Antarctica (granted, that’s from a time when the global climate was warmer and Antarctica was ice-free, but still...).