We can learn a lot about climate change from Venus, our sister planet. Venus currently has a surface temperature of 450℃ (the temperature of an oven’s self-cleaning cycle) and an atmosphere dominated by carbon dioxide (96%) with a density 90 times that of Earth’s. Venus is a very strange place, totally uninhabitable, except perhaps in the clouds some 60 kilometers up where the recent discovery of phosphine may suggest floating microbial life. But the surface is totally inhospitable. However, Venus once likely had an Earth-like climate. According to recent climate modelling, for much of its history Venus had surface temperatures…
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