The Ebola epidemic can serve as an early warning wake-up call to get ready. If we start now, we can be ready for the next epidemic.

The obvious mathematical breakthrough would be development of an easy way to factor large prime numbers.

Now, we put out a lot of carbon dioxide every year, over 26 billion tons. For each American, it's about 20 tons. For people in poor countries, it's less than one ton. It's an average of about five tons for everyone on the planet. And, somehow, we have to make changes that will bring that down to zero.

If you withdraw the incredible focus on polio, it will spread back, and in poor countries you'll get something like 100,000 cases a year. So by being very intense and getting the cases down to zero, what you do is you avoid all the future cases.

Even for the very best programmers ah, sometimes you'll see someone else's program or somebody will come along and they'll show you what can be done in a simpler way.

China is certainly an important player in the global economy, and a widespread AIDS epidemic would threaten that growth.

You can be a business thinker.