I am fastinated by the cosmos, and I love all of our explorations via telescopes and robotic spacecraft. But NASA and Musk, please stop sending men into space, and end the fantasy that we will somehow move human populations to other planets. This is absolute nonsense and a waste of precious resources. At the most you may convince me that a research outpost on the moon could pass some sort of cost/benefit smell test. We will soon have 12 billion humans on earth. How many will you blast to Mars and Pluto?