Believe it or not, highway numbers actually make sense. Here's the logic behind odd and even routes, and why the system isn't ...

An apparently easy-looking math problem has left internet users scratching their heads. Give it a try to see if you can ...

Can you chip in? This year we’ve reached an extraordinary milestone: 1 trillion web pages preserved on the Wayback Machine. This makes us the largest public repository of internet history ever ...

Examining mistakes gives students a chance to discuss misconceptions openly and find new approaches to solving problems.