Maybe if we want to live forever and still have children then this is the only way.
City could be built on on Mars by 2062 – Independent – 22-Jun-17
Elon Musk says a city of a million people could be established on Mars within decades.
Humans would face a “doomsday event” unless we become a “truly multi-planetary species”.
Envisaged creating a Mars Colonial Fleet of 1,000 craft.
If we could warm Mars up, we would once again have a thick atmosphere and liquid oceans.
“It has got to be really fun and exciting… you can do zero-gravity games”
COMMENT: unless everyone is dedicated we’ll need a new drug to address rapid muscle loss in low gravity
Longevity will lead to Overpopulation – IEET – 4-Jul-2015
Article by Live Forever Club’s Adrian Cull considers 2 main strategies:
1. prevent the increase in population or
2. find somewhere for the ever growing mass of people to live.
For the 2nd option it was surprising to find that if the world spent 2% of GDP (similar to current defence spending) on space launches we could remove the 75 million people currently being born every year.
The human universe: Could we colonise the stars? – New Scientist (subscription) – 4-May-15
Three main hurdles: 1. nowhere in our solar system offers a suitable environment, 2. will need significant propulsion power, and 3. interstellar dust likely to damage crafts travelling to other suns.