Also amazing how the writers forgot about the asteroid that wiped out the dinosaurs.
I wondered about the same thing, but my teenage son assured me that since this “earth” was in a “parallel universe” the asteroid wouldn’t necessarily happen.
The series is set in the year 2149.
A rip in time is found, and it leads to a point 85 million years in the past. The asteriod that is theorized to have wiped out the dinosaurs is believed to have hit Earth 65 million years ago.
I just watched the 2-hour conclusion and I thought it was pretty good. I can see why this series costs a pile of money to produce. Lots of actors, extras and special effects.
OTOH: They have almost twenty million years to:
1. Move the humans to another planet.
2. Divert or destroy the asteroid.
Gazillions of bucks in the future ~ no risk at all to a nascent technological civilization.