Eventually we'll have to reach other planets.. and invent wormholes to move past the universe expanding preventing our light cones from reaching other materials.
It gives me an idea for a sci-fi story, where a stable civilization of smart beings faces a threat of the sphere of all-consuming humans expanding at the speed of light.
It gives me an idea for a sci-fi story, where a stable civilization of smart beings faces a threat of the sphere of all-consuming humans expanding at the speed of light.