Pick up a die. Look at the top face and the bottom face together. They add to seven.
Turn it. Any pair of opposite faces adds to seven - one…
Every deck of cards has one card that does not match the others. The ace of spades carries an elaborate design - a large decorated spade, frequently the manufacturer's name,…
The Egg Carton Was Invented to Settle an Argument Between a Hotel Owner and a Farmer About Breakages
The egg carton is one of the most effective pieces of packaging ever designed, and almost nobody looks at it. It protects something with no structural redundancy whatsoever, costs a…
Source: Wikimedia Commons
Look at the number pad on a telephone. The top row is 1, 2, 3 and the bottom row is 7, 8, 9.
Now look at the number…
Source: Wikimedia Commons
The paper drinking straw is not a modern environmental compromise. It is the original manufactured straw, patented in 1888, and the thing it replaced was an actual straw…
Source: Wikimedia Commons
In the ceiling of a fire station in Livermore, California, there is a hand-blown light bulb that has been switched on, with brief interruptions, since 1901. It has…