iOS ships with a basic compass that you can use to find your basic heading when driving or hiking. It's not as robust as some third-party orienteering apps, but it will work in a pinch when these ...

It also shows that this compass information is accurate enough to allow an insect to estimate the distance and direction back to its home, even after moving a long distance away in a random path over ...

If you have a compass, you can know the direction exactly, but not many people carry a compass with them all the time. Also, smartphone apps with a compass function may not be usable in an emergency ...