Is Elon Musk a forward thinker in his pursuit for understanding the eternal human question of "why", or will this open a pandoras box of interstellar species that would use us like cattle for food?
If there are species of higher intelligence out there then they can certainly reach Mars and Earth
I think he is just testing the limits of why not
What is your number one pet peeve while out in public and why should you just get over it?