Part 6/13:
The third concern explores the limitlessness of space travel. The notion of traveling faster than light—common in science fiction—may be physically impossible, grounded in the laws of physics. The speaker reflects on longstanding debates about whether FTL travel could be feasible or is merely speculative.
If faster-than-light travel remains impossible, humanity might be confined to Earth for the foreseeable future. Despite technological ambitions, our current understanding suggests that we might be trapped by fundamental cosmic constraints, leading to a slow, painstaking expansion (or no expansion at all). The universe's vastness and the extreme energy costs of interstellar journeys imply that human exploration could forever be a slow-paced process.