Atmosphere of Venus
In 1761, Russian polymath Mikhail Lomonosov observed an arc of light surrounding the part of Venus off the Sun's disc at the beginning of the egress phase of the transit and concluded that Venus has an atmosphere. In 1940, Rupert Wildt calculated that the amount of CO in the Venusian atmosphere would raise surface temperature above the boiling point for water. This was confirmed when Mariner 2 made radiometer measurements of the temperature in 1962. In 1967, Venera 4 confirmed that the atmosphere consisted primarily of carbon dioxide.
Space: 1889
Beneath a constant shroud of clouds, Venus is a swamp world drenched by nearly continuous rainfall. Much of the surface is covered by a shallow ocean that averages less than ten feet deep. The plants are similar to those of the Mesozoic age of Earth, and dinosaurs roam the jungles.