NASA Tangles With the Metric System

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Science  17 Dec 1999:
Vol. 286, Issue 5448, pp. 2241
DOI: 10.1126/science.286.5448.2241b

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This year saw the failure of two Mars missions: the $87 million Mars Climate Orbiter, which perished in September largely due to confusion between English and metric units; and the Mars Polar Lander, which went missing on 3 December during its final approach to the Red Planet.