As a kid at the World's Fair in 1965, I missed seeing the big global population clock roll over from 2,999,999,999 to 3 billion - I was really disappointed.

The whole of the global economy is based on supplying the cravings of two per cent of the world's population.

To try to really land a spacecraft really on another world is really difficult, and if we lose that ability, it's going to be heartbreaking.

I've always loved airplanes and flight. The space program was really important to me as a kid. I still have a photo of Armstrong and Aldrin on the moon in my living room.

I hope climate science becomes the big thing. And then what I want is electrical engineers to solve the world's energy problems, energy distribution problems. I want mechanical engineers to make better transportation systems. I want chemical engineers to develop better solar panels, and so on.

If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.