Elon Musk spoke with Joe Rogan about getting Mars colonization to the point where it would be self-sustaining without additional supplies or support from Earth.
The entire point for Elon is to sustain the species indefinitely.
Joe Rogan also asked Elon about aliens. Elon answered that there either many aliens or no aliens.
Nextbigfuture believes species sustainability should be achieved by 2100.
There will be conversion to all new cars and trucks being electric by 2030-2040. Almost all cars and trucks will be replaced with electric vehicles by about 2050. The miles driven will mostly be using electric vehicles by 2035. These will be electric robo-taxis.
The energy system will be mostly solar, wind, batteries and nuclear by 2060-2080.
Advanced modular nuclear fission and useful for propulsion nuclear fusion should be here by 2040.
I think a breakthrough with molecular nanotechnology is still likely within 20 years.
Multi-gigawatt laser arrays to propel spacecraft in the solar at high speeds will be implemented by 2050.
Once SpaceX has mass-produced rapidly reusable rockets, this will transform air cargo delivery on Earth and then human long-range air transport. This will also rapidly allow colonization and tourism of the Earth-cislunar area by 2035.
Having large factories in orbit and on the moon means that nuclear propulsion can be built on the moon or in orbit. This and beamed laser propulsion will allow speeds to increase in the solar up to 1% of light speed. We could build the nuclear pulse propulsion orion and get to 10% fo the speed of light with large manned vehicles.
Regular unmanned travel at fifty times our current speeds means we can put millions of telescopes at the gravitational lens points (20 times further than Pluto but 500 times closer than the nearest star.) This would let us use the Suns gravity to have a million times better observation of other solar systems. We would be able to look at large islands on exoplants. We could have megapixel resolution of planets and moons in other solar systems. This high-resolution direct observation of stars and planets within 1000 light-years or even within most of the entire galaxy if we had molecular nanotechnology. This would provide far more data and better answers to if there are aliens or what is happening in the galaxy.
Molecular nanotechnology and nuclear fusion or advanced molten salt nuclear and spoce industrialization would be the basis for easily making many fully sustainable human colonies.
If we did not have molecular nanotechnology we could get by with really good additive manufacturing and factories and robotics hundreds of times better than today.
SOURCES-Joe Rogan, Elon Musk, and some analysis from Brian Wang
Written By Brian Wang, Nextbigfuture.com