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Earth’s sister world does not give up its secrets easily to visiting spacecraft. One planet exhibits more than its share of quirks: Venus.

United kingdomUnited statesNavka planitiaDavid grinspoonMaxwell montesMario molinaVenus multiprobeAkna montesSherwood rowlandPaul hudsonMichael carrollWashington universityHarvard university michael mcelroyUniversity of californiaUnion space research institutePlanetary science institute in tucson