A tin roof is one of the greatest indicators of prosperity in the developing world.

My parents have been incredibly supportive from perhaps the first real independent decision I made to become a vegetarian at 11, which was certainly not consistent with their diet at the time.

At the fourth grade level, girls at the same percentages of boys say they're interested in careers in engineering or math or astrophysics, but by eighth grade that has dropped precipitously.

I think we need to care about the metrics of success in life, and I'm a pretty competitive person.

I love the right words. I think economy and precision of language are important.

Caricatured as navel-gazers, Millennials are said to live for their 'likes' and status updates. But the young people I know often leverage social media in selfless ways.

We need women who are at the head of a boardroom, like at the head of the White House, at the head of kind of major scientific enterprises so that little girls everywhere can then think, you know what? I can do that, I want to do that, I will do that.