Inside America's dead shopping malls | Dan Bell

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

What happens in your brain when you pay attention? | Mehdi Ordikhani-Seyedlar

How to see past your own perspective and find truth | Michael Patrick Lynch

Adventures of an asteroid hunter | Carrie Nugent

Why design should include everyone | Sinéad Burke

Never, ever give up | Diana Nyad