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       So far, relative to the Earth and Venus means the following. Around the period Archean (3.8 billion years ago - 2.5 billion years ago), these planets have the same dense atmosphere of carbon dioxide (97%) and other gases. Since the Earth at a distance of 150 million km., and Venus 108 mln.km., it was clear that today's temperature readings of the planets were to be in the past; on Venus, +460^oC, on the Earth within the current standards. Accordingly, it rained on the Earth, which washed the carbon dioxide from the atmosphere (CO₂ has the ability to dissolve in water), and on Venus oceans turned into steam, which, given the weakness of the planet's magnetic field rose so high above the surface, which was carried by the solar wind in interplanetary space.
       Today everything can be already somewhat differently. Earlier, still in 1972, Carl Sagan and George Mullen indicate that during the Archean early Sun had only 2/3 of its present luminosity indicators, which clearly indicates to the redistribution of heat in the solar system. But it is especially not contradict the theory of CO₂ washout from the atmosphere by rain, as it was obvious that the greenhouse effect is intended, in this case, keep the temperature on the Earth above the freezing point of water. April 1, 2010 Minik Rosing(University of Copenhagen)  et al. presented the public the new data that show the example of striped iron formations in southwest Greenland, that the content of magnetite and siderite in the Archean period, allows to ascertain the value of the concentration of CO₂ in the atmosphere of the Earth in less than three times greater than modern. And now, scientists are still trying to account for the Earth's albedo, and the like to defend the version of what on Earth did exist in the oceans of liquid to the water cycle in the atmosphere. We turn our attention to Venus.
       It is well known: the diameter of Venus 0.949 Earth's diameter, the gravitational acceleration 8.9 m/s², the inner core of the planet is identical in structure and size (7000 km in diameter) and further that such similarities are definitely indicate a relationship of Venus and Earth. Today, on Venus there are no volcanic eruptions and the movement of tectonic plates. This indicates that low activity of the core of the planet (presumably it should consist of iron-nickel alloy with an admixture of siderophile elements), respectively, a weak flow of currents generate a magnetic field (still the hypothesis of "magnetic dynamo, the most reliable in the scientific community). Over time, similar to happen with the Earth, but for now let's go back to the Archaea and presumably restore the young figures of Venus. If we do that, then, above all, achieve those force characteristics of the magnetic field, which will successfully carry out all functions of the terrestrial magnetic field. Next, we note that it is the greenhouse effect is responsible to a greater extent for these temperature readings of Venus' surface, rather than direct effects of the sun. As a fact today may be mentioned that for example the surface of Mercury is heated to 420^oC, and estimated Venus receives only 25% of solar radiation Mercury. If we remove a certain part of +460^oC responsible for the greenhouse effect, and the rest decreased by 33% and add air flow Venus unlit (and therefore colder) side, we obtain a hypothetical assumption is quite reasonable temperature indicators on the planet Venus during the Archean. Also due to the abovementioned normalization of physical quantities, and equalized the pressure on Venus (for a given period, this value 92 times higher than Earth's pressure) to certain acceptable values, and then we can confidently state the fact that the probability of the origin of life on Venus, due to quite suitable conditions (for example, is now on Earth) is absolutely justified and is not something supernatural or ephemeral.        
       Now we can only be based on radio-wave mapping degenerate surface of Venus, while in Archaea such, may have been fertile valley.