Imagine, just for the sake of discussion, that you had a few hours a week and a few dollars a month to donate to a cause - and you wanted to spend that time and money where it would have the greatest impact in saving and improving lives. Where would you spend it?

Countries which receive aid do graduate. Within a generation, Korea went from being a big recipient to being a big aid donor. China used to get quite a bit of aid; now it's aid-neutral.

Vaccines are a miracle; they're fantastic. Anything that makes people hesitate to give their children these vaccines according to the recommended schedule creates risk. Risk for the children who don't get vaccinated and risk for children, some of whom don't have an immune system, so they're benefiting from the fact that the community protection means the disease doesn't get to them.

There are more people dying of malaria than any specific cancer.

I could name about a dozen paths, and you'd like to have a whole bunch of research on all those paths, and then, eventually, at least four to five companies with really significant financing try and get to big scale, going down and really trying to prove it out.

Even with cameras being very cheap, one thing that researchers noticed was that you look really bad in a videoconference image because the lighting is bad and you get shadows and things.

I considered law and math. My Dad was a lawyer. I think though I would have ended up in physics if I didn't end up in computer science.