If you had to buy a new plane every time you flew somewhere, it would be incredibly expensive.

If something's important enough, you should try. Even if you - the probable outcome is failure.

When you struggle with a problem, that's when you understand it.

I don't think very highly of Henrik Fisker. [...H]e thinks the reason we don't have electric cars is for lack of styling

The rumours of the demise of the U.S. manufacturing industry are greatly exaggerated.

If we drive down the cost of transportation in space, we can do great things.

We're running the most dangerous experiment in history right now, which is to see how much carbon dioxide the atmosphere can handle before there is an environmental catastrophe.