Meet the inventor of the electronic spreadsheet | Dan Bricklin

To solve old problems, study new species | Alejandro Sánchez Alvarado

What happens when you have a disease doctors can't diagnose | Jennifer Brea

An electrifying acoustic guitar performance | Rodrigo y Gabriela

"Rollercoaster" | Sara Ramirez

How online abuse of women has spiraled out of control | Ashley Judd

"Awoo" | Sofi Tukker

Why I love a country that once betrayed me | George Takei

The danger of a single story | Chimamanda Ngozi Adichie

The unheard story of David and Goliath | Malcolm Gladwell