However, scientists postulate that Venuss atmosphere was not always so hot. [A] Studies show that large bodies of water were once on Venuss surface but that eventually evaporation of all the water caused the runaway greenhouse effect which regulates the planet today. [B] Thus Venus has become a critical study for todays scientists, as human being are only beginning to struggle with the early stages of the greenhouse effect. [C] Our problems do not stem from evaporated water supplies but from a propagation of carbon dioxide and other greenhouse gases due to industrial and automobile emissions. [D] Another interesting characteristic to note regarding Venuss atmosphere is that its daytime temperatures and nighttime temperatures are not that far removed from each other. This is due to the thermal inertia, the ability of a substance to store heat despite changing temperatures and the transfer of heat by Venuss strong winds. Although winds on the surface of Venus move slowly in comparison with Earths winds, Venuss air is so dense that a slow-moving there can move large obstructions and even skip stones along the planets surface. In 1966, humankind made its first attempt at sending a recording instrument into Venuss atmosphere. The Venera 3 probe did collide with Venus surface; however, the abrupt impact caused its communication system to fail, and it was unable to send and feedback. In 1967, Venera 4 successfully enter Venuss atmosphere and was able to take many readings, one of which recorded that Venuss atmosphere was between ninety and ninety-five percent carbon dioxide. Subsequent Venera probes were sent into Venuss atmosphere, but most of them succumbed to the crushing air pressure.
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