-Harold Aspden (1928–1997) was a British engineer, inventor, and author known for his unconventional theories in the fields of physics and energy. Aspden earned his degree in engineering from the University of Leeds and worked as an engineer and consultant throughout his career. He is best known for his work on the concept of aether and his critiques of mainstream physics, particularly his views on electromagnetic theory and gravitational phenomena.
Aspden made notable contributions to alternative theories of energy and gravitation, challenging established scientific norms. His work included research on "aether" as a medium for electromagnetic propagation and theories on zero-point energy. Aspden authored several books and articles, including The Physics of the Primary State of Matter and The New Physics. Despite his work being considered controversial and outside mainstream scientific consensus, Aspden's theories have contributed to discussions on unconventional physics and alternative energy sources.