How To Prove A Geometric Formula With A Clementine And A Piece of Paper

Here's a fun demonstration from Cornell maths professor Steven Strogatz. Take a clementine (or any spherical, peelable fruit) and trace around its widest part four times. Then peel it. Flatten out the peelings as best you can and divvy them up evenly among the circles. Voilà! Tangible proof that the the surface area… » 1/14/15 4:50pm 1/14/15 4:50pm

A 19th Century Math Genius Taught Us The Best Way To Hold Pizza

We've all been there. You pick up a slice of pizza and you're about to take a bite, but it flops over and dangles limply from your fingers instead. The crust isn't stiff enough to support the weight of the slice. Maybe you should have gone for fewer toppings? No. There's no need to despair. » 10/10/14 9:30am 10/10/14 9:30am

Celebrating Jean-Félix Picard's Birthday With Geodetic Trivia

If you find having a favourite map projection a delightfully geeky quirk, you're going to want to raise a toast in honour of Jean-Félix Picard. Geodetics and cartography owe a debt of gratitude to the 17th century scientist who made the first accurate measurement of the Earth's size. » 7/22/14 5:27am 7/22/14 5:27am

DeLand's Paradox is an illusion that can "disappear" a whole person

Let's say you are cornered by your worst enemy. They will kill you, but being an oddball enemy, they'll give you one request first. (And the request can't be "Don't kill me." They're on to that one.) I have a solution for you. Ask them to show you how DeLand's Paradox works. That will keep them busy for years while… » 1/11/13 7:00am 1/11/13 7:00am