Question: Is there any reason they have to go to that particular time to start their colony? Why not say 64 million years ago? Since it's after the dinosaurs, but before the evolution of sabertooths and mammoths? It'd be a lot safer.
Terra Nova (2011)
1 question
Starring: Jason O'Mara, Allison Miller, Christine Adams, Shelley Conn
Genres: Sci-fi
Continuity mistake: After removing their rebreathers, they are again with them at 12:48, and then are sans the rebreathers and their jackets at 13:19.
Chosen answer: Because that's where the rift led. They don't have a time-travel machine, capable of taking them wherever they please - all they have is a hole in time leading to one single time period.
Tailkinker ★