‘Maglev’ is a portmanteau of ‘magnetic levitation’. Instead of running on wheels, maglev technology uses strong magnetic fields to lift the train and move it forward. Since the train floats above the track, there is no rolling friction during normal operations, nor are operations affected by inclement weather, like rain or snow. The result: the train can move at extremely high speed, topping 400 km/hr, while also giving passengers a smooth ride.

Nature has four fundamental forces: the two nuclear forces, the electromagnetic force, and gravity. Of them, gravity is the weakest by far — around 1039 times weaker than the electromagnetic force. This is why a small magnet can stay stuck to your fridge despite having the entire gravitational force of the earth pulling it down. The same idea applies to lifting a train weighing somewhere from 150 to 500 tonnes.