A controversial idea is forcing physicists to respond.

In late 2023 and through 2024, a claim began circulating well beyond engineering circles. Salvatore Pais, a former aerospace engineer whose work has previously drawn attention inside the U.S. defense research ecosystem, asserted that a new class of engineered systems could manipulate inertia itself. If correct, the implications would reach far beyond flight. Gravity, long treated as untouchable outside theory, would become something engineers could influence. Scientists are cautious, but they are no longer ignoring the claim.



