Editorial note. Due to an editing error last week’s chart included the number “1”, representing the number of deep-space spacewalks (as opposed to moonwalks) during Apollo 15. Although that statistic had been considered, the intention was to instead present the number of parachutes which failed to open during the (safe) splashdown. I regret the mistake and include the corrected chart here. Thank you for your understanding.
Reference: European History 1648 to 1789, R M Rayner.