The greatest of people in society carve niches that represent the unique expression of their combinations of talents. If everyone had the luxury of expressing the unique combination of talents in this world, our society would be transofrmed over night.

There's no shortage of people that we can put on, because science touches us all.

Where ignorance lurks, so too do the frontiers of discovery and imagination

With no gravitational force to work against, your body not only doesn't need the same amount of muscle and bone, it starts breaking them down. As on Earth, so in space: use it or lose it. And exercise may not solve the problem.

85 percent of the gravity of the universe has a point of origin about which we know nothing.

Space enthusiasts are the most susceptible demographic to delusion that I have ever seen.

Essentially every scientist, when posed with the question, "If you want to get science knowledge from Mars, do you want to send a geologist or do you want to send a robot?" Well, the real answer is, you can send 100 robots for the price of sending one geologist, so let's send 100 robots to 100 different locations, and then we would all benefit. So that's the answer you would get. And I agree with that answer.