Elon Musk’s quest to make humanity a multi-planet species has a hitch.
The SpaceX boss hopes to have people landing on Mars within five years as part of his vision for a “futuristic Noah’s ark”. But Musk fears his plan to colonise the Red Planet will fail to take off if Earth cannot even sustain its own population.
“We should be much more worried about population collapse,” Musk warned in a series of tweets last week, calling the UN’s more sanguine projections “utter nonsense”.
