Rare earth magnets are the strongest permanent magnets found on earth. Due to their strength, rare earth magnets such as Neodymium have replaced ferrite and alnico magnets which were in use before the discovery of rare earth magnets. Rare earth magnets are extremely strong magnets that can crush an object placed in between two magnets of opposite poles. For instance, if a finger or a bone is placed in between two pieces of permanent magnets it will be crushed.
The Herculean features of these magnets were discovered in the late 1960s by the U.S DoD (Department of Defense). Twenty years later the magnets were developed for industrial use. Some of the applications of these strong magnets included making bullet trains, elevators and roller coasters. They are also commonly used in science laboratories and in making stereo speakers and computer hard drives.
Rare earth magnets are now being used in almost every aspect of life whether in a communist or capitalist state. These magnets are the driving force behind modern industrialization and without them life on earth would never be the same.
Luckily, these magnets are here to stay since their magnetic field is permanent and can only be removed using a strong demagnetizing force. There are many scientific theories being conjured up about the possibility of terrorists or governments alike trying to hijack a bullet train in another country or reversing the direction of the train from a remote location.
Apart from Neodymium, there is also another type of rare earth magnet which is superior. That is the samarium-cobalt magnet which very rare and far too expensive to procure.
While rare earth magnets are very strong magnets, they are also very brittle and each magnet has to be coated with a protective material to keep it from breaking easily if it falls.