Will the human body need to undergo a reduction of parts in order to travel in space?

Our frame is skeletal and muscular and without periodic excercize we turn to mush.I note that most of the sightings of "ET'S" show small hairless round eyes thin limbs small mouth creatures "Close incounters".What say you??

I'm confuzzled. =(

All of those sightings reflect "science's" view that through continued evolution, concentration of Darwinian pressures for developing stronger and larger bodies will wain as we focus on intelligence and larger brains. Of course, as our body hair now has little if no more "functional" value, it also will disappear over the course of future generations. Our mouths and teeth structure will have lessening functionality as food will become more standardized in size and consistency. The so-called aliens also have larger brain:body ratio...more body mass as a proportion is dedicated to brain size to reflect future genetic pressures for selection of mates of higher intellect...this all reflects Darwinian principles that only the most useful and functional traits with increased survival and procreation rates will be passed down to successive generations....THIS IS ALL THEORY!!! In fact, over the course of the last several generations, Darwinian pressures for natural selection has been for procreation with "larger" males, not smaller and shorter...people have been increasing in stature for a long time, much of which can be explained by increased nutrition, but it cannot be ignored that many women find taller men more attractive. So at least for the short term (several more generations), humanity will be increasing in size and stature.
A lot of future genetic selection is no longer based on who has the best survival rates in a hostile environment as practically everyone born in modern times can survive in today's world. What it all comes down to now is what traits are more attractive to male and female counterparts, whether it be physical, intellectual, or personality-based...that's the future of human evolution.
Of course, there is always the possibility that exhausted and reduced food supplies for feeding untold billions of people in the future can possibly lead to people with slower metabolisms actually being "selected for" as a positive trait...you can perhaps feed 10 people with a slow metabolism vs 8 with a fast metabolism with the same amount of food....who knows what the future has in store?!?!

I say no human has ever seen an alien and the stories of people who claim to have seen aliens are only false memories of people with psychological problems.

It is true that humans in space adapt to the lower requirements on their bodies, and they adapt to it quite quickly.

That shouldn’t be a requirement for space travel though. If you create a constant thrusting engine, or use a rotating cylinder to artificially produce gravity or simulate it then you don’t need to change the human body much. One current plan for a Mars mission would be to put the crew capsule on a tether and rotate it during the long coast phase so that the astronauts will be still have their strength and be able to walk on Mars after they reach it. Currently, after returning from a space mission the astronauts need help to walk, the longer the mission the more help they need. If you spend a few months in space, despite a daily exercise routine the astronaut can’t walk for a while, not until their body rebuilds that missing bone mass and muscle.

The speed of light limit means that any travel to the stars will be a very long trip. Alpha Centauri is almost 4 light years away and it is our nearest neighbor. One idea proposed by science fiction authors to make that trip would be to use generation ships where whole generations of people are born, learn how to run the spaceship, and die along the voyage. Another idea is to send DNA. We can freeze human sperm and eggs and re-thaw them years later and get them to successfully breed. If we invented an artificial womb to incubate them in, and sent along a team of robotic nannies then we could send our colonists to a new planet and grow them there.

Of course if we can just figure out how gravity works and a way to artificially generate it then we would neatly sidestep the problem; that’s how it is done on Star Trek.

The problem with most ET sightings is they seem to be getting along fine under 1 G. The so called greys are shorter and have bigger hairless heads and bigger eyes. This is probably not an adaption to space; but an increase in evolutionary processes. A smaller body, means there is less mass that has to be supported, the eyes our one of our most important sense organs since we gain most of our knowledge visually, and a larger brain would let is increase our intelligence. However, if you analyze the bodies of these ETs you have to wonder how they have kids? The human brain of a baby is limited to the pelvic girdle of the human female. Even then the head barely comes out and it’s bones are not fully formed so that it can make the passage down the birth canal. The grey version of ETs don’t have a body that can carry their young never mind give birth to them. They must lay eggs or have some other means of reproduction.