13:36

The Second Derivative | CALCULUS - Part 9

27:26

This open problem taught me what topology is

13:34

Derivatives of Trig, Log, and Exp Functions | CALCULUS - Part 10

14:45

Where does “e” come from?

9:08

Introduction | CALCULUS - Part 1

28:33

Terence Tao on how we measure the cosmos | The Distance Ladder Part 1

33:37

Something Strange Happens When You Trust Quantum Mechanics

2:59:44

Best of Tchaikovsky - Classical Music Gems