The challenge of ensuring adequate, nutrient-rich food for an expanding global population is a daunting one, especially given constraints on key resources like water and agricultural land.

Since I was 18, I have swum for 50 minutes every day, missing less than one day a year except for a two-week stint when I was training as a cosmonaut in Baikonur, Kazakhstan, in March 2009.

The Internet is like alcohol in some sense. It accentuates what you would do anyway. If you want to be a loner, you can be more alone. If you want to connect, it makes it easier to connect.

People have to understand that they can reject technology. They can turn off their cell phone. They can stop looking at their e-mail. It's there if they want it. It's not being forced on them.

There's almost no way of doing importing honestly, because if you do you're at such a disadvantage competitively. So people spend huge amounts of effort getting around stupid laws and not paying taxes.

And the Russians certainly don't have it. If a woman shows up in a fur coat, I just assume she's a crook. And that's me, the nice American. The assumption that you can't make money honestly is a killer.

I became the research department for a firm on Wall Street and eventually started working on the newsletter 'Release 1.0,' which I ran for 25 years. That was how I learned all about PCs and the Internet.

It looks simple to come up with a tablet that works, but it is not, ... In order to have the power and portability you need, you need power. The screen is the part of the device that uses the most power.

We invented our computers in the '80s. We networked them together in the '90s. Now we're giving them eyes, ears and sensory organs. And we're asking them to observe and manipulate the world on our behalf.

In the sense that people who produce things and work get rewarded, statistically. You don't get rewarded precisely for your effort, but in Russia you got rewarded for being alive, but not very well rewarded.

What I'm thinking about more and more these days is simply the importance of transparency, and Jefferson's saying that he'd rather have a free press without a government than a government without a free press.

Anyone will tell you if you want to run a business, you need to monitor costs and revenues. In the same manner, if you want to run your body, you need to monitor intake and returns. It's in your best interest.

In this the age of concern over privacy invasion and surveillance and manipulation, people will start to realize that there is no way to avoid being manipulated by other people, governments, marketers, and the like.

Encryption...is a powerful defensive weapon for free people. It offers a technical guarantee of privacy, regardless of who is running the government... It's hard to think of a more powerful, less dangerous tool for liberty.

I've seen disgusting excess in business, and I've seen disgusting excess in Washington. But at the same time, I've certainly learned that Washington matters and that you can't ignore it, especially when you get into telecom.

New landscape of personal media has given us a vaster wasteland of cyberspace. But, luckily for us, there's some really wonderful stuff in it. And if history is any guide, as the media matures, the quality will continue to go up.

I think I have the right to know what Steve Forbes paid in taxes - I don't think there should be a law. I think there should be a presumption. I wouldn't vote for a guy who wouldn't reveal what he paid in taxes. That kind of thing.

People still have a choice, but, if they find it all too confusing, or they just want someone else to make a choice for them, there's a default that works pretty well. That's this concept of libertarian paternalism. And it's handy.

Oh, that all the things my father had told me about how disgusting Washington is are true. And again it's the system - there are lots of nice, well-meaning people there. But it's a sleazy place. And politics is all about doing favors.

I think that the use of copyright is going to change dramatically. Part of it is economics. There is just going to be so much content out there - there's a scarcity of attention. Information consumes attention, and there's too much information.

I think copyright is moral, proper. I think a creator has the right to control the disposition of his or her works - I actually believe that the financial issue is less important than the integrity of the work, the attribution, that kind of stuff.

I am not in favor of immortality. I believe death for humans is the way of getting rid of accumulated errors - as in trial and error. Without death, the old folks would start to gang up on the babies (the new trials). Immortality --> immortal mistakes.

I had a lot of successes, but what really made me fearless was my complete failure at Zidd-Davis. Once you've lived through that, you know you can survive, and you're not as scared... There's nothing to build confidence like real achievement, but also like real failure.

I enjoy it; my experiences abroad have taught me the importance of an open mind and have given me a willingness to wander off the beaten path - not only to keep life interesting, but also to understand in a meaningful way that things do not look the same from every vantage point.

Few influential people involved with the Internet claim that it is a good in and of itself. It is a powerful tool for solving social problems, just as it is a tool for making money, finding lost relatives, receiving medical advice, or, come to that, trading instructions for making bombs.

The Internet is an incredible business tool. First of all, the Internet/the cell phone - the cell phone is just another way to get at it - I think is having a huge impact in Africa most particularly, where it enables people - suddenly, they know crop prices. They can communicate. It makes their lives more efficient.

The great thing is, Internet allows you to create your own job, not just look for jobs other people are going to give you. And that, combined with the American spirit, I think, is going to help us come out of the recession faster than other countries. And I think it's going to help Africa come out of, you know, a century of slump.

It's not that you have jobs on the Internet, but the Internet makes it possible for more people to build their own jobs. What it does is, it erodes the power of institutions. It used to be you needed an institution to have a job. But, if you look at the three of us on this show, I don't think any of us is really employed by an institution. We run our own lives.

We had made a - sort of a national decision that we wanted to be this intellectual property country, where we would have things manufactured in China, but we would do the design, we would do the creative stuff.And now what we have done is, we have forgotten that that's what we wanted, and we're making the intellectual stuff more and more free. And, so, we're sort of left with less and less.

The inner sort of consumer identity got the best of people. And everybody just wants things for free. And that's created this strange kind of cheapness to everything, where everything becomes throwaway. And people, I think, have started to undervalue things, maybe because there's too much, maybe because it's too easy to make, but I think mostly just because, somehow, that's the pattern that got set. And I think that's regrettable.

Internet becoming accessible everywhere, whether it was Wi-Fi at work, on your cell phone as you traveled. People had it at home with broadband. There was a big change.It used to be people used the Internet primarily at work, because that's where they had a good connection. Now they're using it at home. And the second big change is, they used it not just to get information, but to communicate with one another. And, so, it became not simply an information exchange, but a personal exchange, a communication mechanism.

What's really going on here is, this is a media shift. It's comparable to what happened in the 1950s and the birth of electronic mass media back then.This is the birth of a new kind of personal media, where, instead of we're all watching one program, we're all watching each other. And the history of media makes it really clear. Whenever we have a big innovation, the first wave of stuff we do is pretty crummy. The printing press gave us pornography, cheap thrillers, and how-to books. Television gave us Newt Minow's vast wasteland.

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