We need to listen to each other because lives need to be shared, we are a communal species, and isolation kills.

FORBES: Thin-Slicing, Malcolm Gladwell, and the Chinese Character for Listening

During the times of isolation, a number of species of giant duck-billed dinosaurs "roamed a much smaller area than you might think given that many were larger than elephants, " Gates said.

MSN: Dinosaur boom linked to rise of Rocky Mountains

And it is entirely possible that if these humans remained in reproductive isolation for long enough, they could evolve into another species altogether.

BBC: Humans will 'sail to the stars'