:::Sagan's theory was pseudo-science. The atmosphere on Venus is 92 times thicker than Earth's. That's so thick it is almost a CO<sub>2</sub> ocean rather than an atmosphere. You can't learn Earth's future by studying Venus. [[User:PeterKa|PeterKa]] ([[User talk:PeterKa|talk]]) 03:21, 4 January 2019 (EST) | :::Sagan's theory was pseudo-science. The atmosphere on Venus is 92 times thicker than Earth's. That's so thick it is almost a CO<sub>2</sub> ocean rather than an atmosphere. You can't learn Earth's future by studying Venus. [[User:PeterKa|PeterKa]] ([[User talk:PeterKa|talk]]) 03:21, 4 January 2019 (EST) |