AP
- Elon Musk wants to build a colony on Mars by 2050.
- The billionaire has long argued humans need to become a multi-planet species to survive.
- DeepMind CEO Demis Hassabis has flagged a potential flaw with Musk's plan — and he's far from alone.
Elon Musk hasn't been shy about his plans to colonize Mars.
For years, the billionaire has argued that humans must become a multi-planet species as quickly as possible to escape potential threats on Earth like overpopulation.