Have you ever wondered how aliens would like if ever they really exist? We all have watched movies of how aliens look like, but since nobody has really proven yet whether they exist in reality; the physical appearance of aliens still remains a wonder. For some people, they would always imagine the aliens to look like creepy creatures without the proper placement of the eyes, nose, mouth, and ears, in other words, simply not like how people really look like. But what if aliens look like humans? What if life really exists in other planets but they look just like us? How about the animals, some of them have unusual senses, does it mean that they are aliens too?
There are facts that evolution has attempted different vision systems, which ranges from absolute blindness to almost three eyes in some species. On the other hand, binocular or two eyed vision appears to have succeeded across the board among those species with similar size and capabilities to man. Therefore, to be realistic we should in one way or another expect that the same thing could possibly be exist in other planets if there is really life existing there. In terms of visual light as well as motion sensitivity, nature has been experimented as well, with the result predatory sensitivity to movement. This information would give us the idea that whatever extra terrestrial race exists on the other planets would have the same; although, perhaps their environment would have difference too, if we really want to make a comparison with the atmosphere and environment of the Earth.
If you would notice, or have studied, cetaceans or the dolphins and whales, sharks, squids which are under the cephalopods have unusual senses. Their sensory apparatus though is created to be adaptable to the underwater; their eyes are located on the sides of their heads and not on the front part unlike the animals that wee see on land. In terms of the senses of some animals, they also have different sensory compared to the human beings and very unique in fact that some of them can possess very unique hearing or tasting capacities or seeing things at dark environments that humans cannot do without the help of technology. These characteristics are present on earth but can possibly be present on other planets too if life really exist there and it could be possible that instead of animals, their humans inhibit those characteristics which makes them very strange to humans. This is usually the ones depicted in movies making them really weird looking.
Apart from the requirement for free time to develop particular physical attributes, there is likewise the subject of spare energy. Intelligence appears improbable to develop in some shapes not due to the extremities in size, short of time, or controlling limbs free of mobility functions, however instead for reasons of extreme energy spending or low density nutritional contents in available food. Just as small amount can impose too much time is used eating, rigorous energy usage, low energy compliant diets, or an incompetent bodily aim for energy use can too.