May 7—You can read maps for years and not see all the information they have to offer. I should know. As a hiker, I rely on maps to help me confidently explore trails. As I've huffed and puffed uphill, ...

Add Yahoo as a preferred source to see more of our stories on Google. How does a magnetic compass work: compass. How does a magnetic compass work? Well, it’s all down to basic physics and human ...

A compass that relies on polarised light can use the sun to tell where magnetic north is, even when it is cloudy. It is based on how some insects navigate and could be used when conventional magnetic ...