Corrections and Clarifications

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Science  04 Oct 1996:
Vol. 274, Issue 5284, pp. 21
DOI: 10.1126/science.274.5284.21b


In the response by D. S. McKay et al. (p. 1640) to letters titled “Past life on Mars?” (20 Sept., p. 1639), the microscope technology mentioned should have read, “field emission gun scanning electron microscope.”