Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. There are several reasons ...

Trying to understand how a map relates to what’s on the ground can be tricky. It requires the brain to do a lot of stuff that it doesn’t customarily do daily. This is one of the reasons that ...

At some point during our primary school careers, most of us probably constructed a simple compass, often by floating a magnetized needle on a cork in a cup of water. The water in such a configuration ...