While it's difficult to predict the future with absolute certainty, some things are considered highly unlikely or improbable based on our current understanding of the laws of physics, biology, and other factors. Here are some examples of things that are believed to never happen:
Violation of the laws of physics: Events that contradict fundamental laws of physics, such as the conservation of energy or the impossibility of exceeding the speed of light in a vacuum.
Time travel to the past: As of our current knowledge, backward time travel is considered implausible due to various paradoxes, such as the famous "grandfather paradox."
Perpetual motion machines: Devices that produce more energy than they consume, violating the principles of thermodynamics.
True immortality: While advances in medicine may extend human lifespans, achieving true immortality, where a person never dies from any cause, is considered unrealistic due to the nature of aging and the inevitable decay of the human body over time.
Teleportation of complex organisms: While quantum teleportation has been achieved with subatomic particles, teleporting complex organisms, including humans, faces enormous challenges regarding preserving the intricate details of the biological system.
Breaking the uncertainty principle: The Heisenberg uncertainty principle, a fundamental concept in quantum mechanics, suggests that it is impossible to simultaneously know both the precise position and momentum of a subatomic particle.
Contact with extraterrestrial intelligent civilizations: While the universe is vast, and the possibility of other intelligent life exists, the distances involved make direct contact with extraterrestrial civilizations extremely unlikely.
Achieving absolute zero temperature: Absolute zero (-273.15°C or 0 Kelvin) is the lowest temperature possible, where all molecular motion stops. Reaching this point is practically unattainable.
Perpetual peace among all nations: While societies strive for peace, achieving a state of perpetual peace among all nations globally is a complex and elusive goal given the diversity of geopolitical interests and conflicts.
Perfect simulation of consciousness: While advances in artificial intelligence are promising, replicating consciousness and subjective experience in machines may remain a philosophical and technological challenge that may never be fully realized.
Remember, some of these things may be subject to change as science and technology advance, and new discoveries are made. But as of our current understanding, these are considered highly improbable or impossible scenarios.