Why does the universe exist? | Jim Holt | TED

(17:22)

Why sitting is bad for you - Murat Dalkilinç

(5:5)

Why the majority is always wrong | Paul Rulkens | TEDxMaastricht

(11:26)

Why do people get so anxious about math? - Orly Rubinsten

(4:37)

Why do your knuckles pop? - Eleanor Nelsen

(4:22)

Why we laugh | Sophie Scott

(17:9)

This could be why you're depressed or anxious | Johann Hari | TED

(20:32)

لماذا تُماطِل حتى عندما تشعُر بالسوء

(5:47)

Why do we feel nostalgia? - Clay Routledge

(4:9)

Why you think you're right -- even if you're wrong | Julia Galef

(11:38)

Why our IQ levels are higher than our grandparents' | James Flynn

(18:41)

Why are some people left-handed? - Daniel M. Abrams

(5:7)

Why Your Body Fights Weight Loss | Katherine Saunders | TED

(11:36)

Why Sitting Down Destroys You | Roger Frampton | TEDxLeamingtonSpa

(13:20)

Why should you read Tolstoy's \

(5:10)

Why is biodiversity so important? - Kim Preshoff

(4:19)

Why comfort will ruin your life | Bill Eckstrom | TEDxUniversityofNevada

(12:35)

Why fasting bolsters brain power: Mark Mattson at TEDxJohnsHopkinsUniversity

(16:44)

Start with why -- how great leaders inspire action | Simon Sinek | TEDxPugetSound

(18:2)