Shiza Shahid: We Must Empower Adolescent Girls

"What we believe is that there is no single, more powerful intervention than investing in adolescent girls," says Shiza Shahid, cofounder and CEO of the Malala Fund. And the world is taking notice. Last week, 17-year-old Malala Yousafzai accepted a Nobel Peace Prize for risking her life promoting girls education. Watch Shahid's Big Idea (video: 3 minutes), in which she demonstrates how investing in girls education and health is the silver bullet in development.

Celebrating String Theory

As string theory turns 30, we are reminded of Brian Greene's impassioned call to elevate science education: "Science is the greatest of adventure stories," says Greene. "We need to embark on a cultural shift in which science takes its rightful place next to art, music, and literature as something that is indispensable to a complete life." Watch his Big Idea (video: 8 minutes).