One of the challenging aspirations of humankind is to make itself a multi-planetary species. It's not for leisure. it is necessary. More than 99 percent of all species, that ever lived on this planet have been wiped out. Dinosaurs didn't survive. What are the odds that we will? After all the progress we have made in human biology, astronomy, technology, we can't just be here and meet an inevitable extinct. We need to shift so that we can increase our chance of survival. We are not going gentle into that good night. We will rage against the dying of the light. For now, we are aiming for Mars. But it is easier said than done. Mars doesn't have a habitable atmosphere. So, we first need to terraform it. And even before that, we first have to land on Mars. So far of our every attempt, we have have been successful in a few, and every one of those was unmanned. Because the risk is too high. There is a risk of radiation. Mars soil has toxicity. We don't even know a...