FILE - In this May 14, 2013 file photo, Leonard Nimoy gives a "Live Long and Prosper" hand gesture arrives at the LA premiere of "Star Trek Into Darkness" in Los Angeles. The Museum of Science, Boston, in collaboration with the Nimoy's family announced the development of a monument shaped in the hand gesture made famous by the actor's character, Mister Spock, to honor the Boston native who died in 2015. (Photo by Jordan Strauss/Invision/AP, File)BOSTON – The Museum of Science in Boston is paying tribute to city native Leonard Nimoy with a 20-foot sculpture shaped like Mr. Spock's split-fingered “live long and prosper" hand gesture, the museum and the late “Star Trek” actor's family announced Friday. The announcement was made on the same day former Mayor Marty Walsh proclaimed Leonard Nimoy Day in the city. “The ‘live long and prosper’ symbol represents a message that my dad believed so strongly in,” his daughter, Julie Nimoy, said in a statement.