Tegan And Sara - The Con (Video)

Tegan and Sara - Walking With A Ghost - Late Night with Conan O'Brien

Russell's Paradox - a simple explanation of a profound problem

Deaf Pedestrians - 15 Beers Ago Music Video

Tegan And Sara - Back In Your Head (Video)

Body Work Official Music Video - Morgan Page ft. Tegan & Sara

Tegan and Sara - Walking With A Ghost (Live on KEXP)

Counting Crows - Accidentally In Love Official Music Video

A math GENIUS taught me how to LEARN ANYTHING in 3 months (it's easy)

Stupidity: A powerful force in human history

Tegan and Sara - On Directing [Official Music Video]

Tegan And Sara - Nineteen [Video Chapter]

Nancy Sinatra - These Boots Are Made For Walkin' (Official Music Video)

Tiësto feat. Tegan And Sara - Feel It In My Bones

The Who My Generation Smothers Brothers, 1967

Tegan and Sara - The Cure (Acoustic Performance)

Peter Gabriel - Games Without Frontiers

Yeah Yeah Yeahs - Maps (Official Music Video)

Tegan and Sara - Walking With A Ghost [Official Music Video]

Tegan & Sara perform "Just Like a Pill" Live for P!nk at Billboard Women In Music 2013