A group of exceptionally talented and ambitious researchers working out of the University of Cambridge have developed a truly incredible nano-engine that is claimed, with pretty good reason, to be the world's smallest engine.
The engine is made out of miniature charged particles of gold. When heated up with a laser, it stores a huge amount of energy that can then be released, with a good analogy being the way a spring absorbs energy and then releases it outwards.
This particular nano-scale engine isn't merely notable for being the world's smallest engine, as it could be used for a wide variety of applications. For example, it could be used in the development of microscopic robots that could enter the human body and fight viruses and disease.
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