👉 The founded fluid, also known as the foundational fluid or simply fluid, is a hypothetical substance proposed by physicist Brian Greene in his theory of extra dimensions. It is envisioned as a dense, incompressible fluid that permeates the extra spatial dimensions beyond our familiar three dimensions of space and one of time. This fluid is thought to have unique properties that could help explain phenomena such as gravity's weakness compared to other fundamental forces, as it might distribute gravitational effects more evenly across these additional dimensions. Greene's concept aims to bridge gaps in our understanding of physics, particularly in reconciling general relativity with quantum mechanics.