You stop planetary exploration, those people who do that extraordinary work are going to have to go do something else.

To leave the world better than you found it, sometimes you have to pick up other people's trash.

The world's going to change climatically. We just want to control the change. We want to have a high quality of life for billions of people as we pass through this era.

I meet so many people who are intimidated by arithmetic.

Researchers have proven that scientifically, that all humans are one people