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96%VideoFeb 2012

What and why do we have leap years

(7:00) 2012 is a leap year, meaning February has 29 days rather than 28.


96%VideoFeb 2013

Drawing Apparatus

(1:45) Artist Robert Howsare's spirograph inspired drawings using two turntables.


96%VideoJun 2014

Concave mirror at Exploratorium

(2:17) Tour guide at the Exploratorium in San Francisco demonstrates some fun properties of the concave mirror exhibit.

95%VideoApr 2012

The eight billion dollar iPod

(5:12) American author and entrepreneur Rob Reid applies 'copyright math' to analyse the cost of music piracy to the entertainment industry, using actual numbers from entertainment industry lawyers and lobbyists.


95%VideoAug 2006

Powers of Ten

Relativity in the universe. Film by Charles and Ray Eames, ground-breaking 20th Century designers.


94%VideoApr 2014

Calculus II - Coming to a college near you!

(0:53) Inspired trailer for Calculus II summer course.


94%VideoJul 2014

A piece of paper as big as the universe

(2:34) Hypothetically speaking, how many times would you need to fold a piece of paper, for it to be as thick as the observable universe? Science enthusiast Nikola Slavkovic puts exponential growth into perspective.


94%VideoFeb 2018

Skating across the sky


94%AnimationNov 2012

The Monty Hall Problem explained

(2:48) Probability puzzle that still stumps some mathematicians.


94%VideoAug 2013

Numberfile - Phone button layout

(7:42) Sarah Wiseman discusses why phone buttons are laid out the way they are.