Venusians in Ufology
Many supposed contactees of the 1950s such as George Adamski, Howard Menger, and Luis Maertens have claimed to have encountered friendly human-like Venusians. These beings were often described as blond-haired Nordic-like humanoids.
One issue with this alleged humanoid habitation however is that Venus has subsequently been scientifically shown to have an extremely hot climate, apparently non-conducive to life and seemingly in opposition to the ideas of a life. However, it is speculated that the atmosphere of Venus up to around 4 billion years ago was more like that of the Earth with liquid water on the surface. The runaway greenhouse effect may have been caused by the evaporation of the surface water and subsequent rise of the levels of other greenhouse gases.
Despite the harsh conditions on the surface, the atmospheric pressure and temperature at about 50 km to 65 km above the surface of the planet is nearly the same as that of the Earth, making its upper atmosphere the most Earth-like area in the Solar System, even more so than the surface of Mars. Due to the similarity in pressure and temperature and the fact that breathable air (21% oxygen, 78% nitrogen) is a lifting gas on Venus in the same way that helium is a lifting gas on Earth, the upper atmosphere has been proposed as a location for both exploration and colonization.
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