Milestones, Dec. 24, 1973

Died. Wolf V. Vishniac, 51, a microbiologist who designed one of the devices to be used to search for life on Mars during the U.S.'s first soft-landing attempt in 1975-76; after falling down an ice slope during an expedition to Antarctica. Vishniac's "Wolf trap" is the size of a cigar box and contains adhesive-coated strings that will be dragged through Mars' arid soil, then reeled into the container, where any life forms stuck to the strings will be detected. —Died. Marian Young Taylor, 65, known to radio listeners for 32 years as Martha Deane,...

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