Paul Siz warned in the 1990s that the Soviet Union had developed microwave-powered spacecraft using plasma fusion propulsion

Richard Feynman calculated that zero-point energy contains massive amounts of energy that we're not aware of due to being in equilibrium with it

Stochastic electrodynamics (SED) provides an alternative framework to quantum electrodynamics that includes scalar potentials and the concept of the ether

The speed of light is not constant and can be manipulated by changing the permittivity and permeability of the vacuum

The Schwinger limit allows interaction with virtual particle pairs, enabling extraction of energy from the vacuum

Zitterbewegung resonance can amplify quantum tunneling probabilities for cold fusion applications

The drones sighted in December over the US may be related to the plasma propulsion technology Paul Siz warned about