Gyroscope of human body1/29/2024 As early as 2,000 years ago, Chinese scientists may have known that rubbing an iron bar (such as a needle) with a naturally occurring magnet, called a lodestone, would temporarily magnetize the needle so that it would point north and south. Scientists and historians don’t know when the principles behind magnetic compasses were discovered. The ends point to what are known as magnetic north and magnetic south. Magnetic compasses consist of a magnetized needle that is allowed to rotate so it lines up with Earth's magnetic field. While the design and construction of this type of compass has changed significantly over the centuries, the concept of how it works has remained the same. They have become so popular that the term “compass” almost always refers a magnetic compass. Magnetic compasses are the most well known type of compass. It is one of the most important instruments for navigation. A compass is a device that indicates direction.
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