Paleoanthropologist Dr. Matthew Skinner, together with artist Quentin Devine, examined three different scenarios for changing the human habitat, namely: global warming, Ice Age and colonization of other planets. In their opinion, in any of these cases, the current appearance of a person may change.
So as the Arctic glaciers melt and the level of the World Ocean rises, some of the people adapt to life in the sea, like the hero of the film "Water World" performed by Kevin Costner.
As a result of the mutation, membranes will appear on their hands and feet between the fingers, and the eyes, in conditions of a lack of light at depth, thanks to an additional layer of the retina, will acquire the ability to see in the dark. An additional transparent eyelid will protect them from water.
Young children build up a store of fat that will be stored until they grow up. Regular stay in shallow water will push people to create artificial gills, while the capacity of the lungs and the volume of the chest will significantly decrease.
In the event of the onset of the Ice Age, people's skin will become paler. It is necessary for the production of vitamin D in a sunlight deficient environment. The hairline, muscle volume and the size of the nose will increase. A large nose will help heat the inhaled air.
People who have moved to other planets will change. With reduced gravity, a person will develop and increase his arms, and his legs, on the contrary, will become shorter, since this will make it easier to grasp various objects.
Dr. Skinner himself classifies his predictions as fiction, but if they ever become reality, then not earlier than in a few thousand years.