It's important that we attempt to extend life beyond Earth now. It is the first time in the four billion-year history of Earth that it's been possible, and that window could be open for a long time - hopefully it is - or it could be open for a short time. We should err on the side of caution and do something now.

The reason we should do a carbon tax is because it's the right thing to do. It's economics 101, elementary stuff.

Target launch date for Falcon I maiden flight is Halloween(October 31) from our island launch complex in the Kwajalein Atoll. For potential customers out there, I should mention that Kwajalein has some of the worlds best scuba diving and snorkeling! It is literally a tropical paradise.

I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

So, there's quite a big keep-out zone, and when you factor the keep-out zone into account, the solar panels put on that area would typically generate more power than that nuclear power plant.

It was obvious to me that we could never colonize Mars without reusability, any more than America would have been colonized if they had to burn the ships after every trip.

I think you should always be seeking negative feedback.