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A detail of the beard of Egyptian boy king Tutankhamun's golden funerary mask is seen at the Egyptian Museum in Cairo after its restoration, on December 16, 2015. The restored mask -- now back in its display case at the museum -- was shown to journalists after a team of German experts worked on it for more than two months to remove a crust of dried glue from the beard of the priceless relic. AFP PHOTO / MOHAMED EL-SHAHED / AFP / MOHAMED EL-SHAHED (Photo credit should read MOHAMED EL-SHAHED/AFP via Getty Images)

A detail of the beard of Egyptian boy king Tutankhamun's golden funerary mask  is seen at the Egyptian Museum in Cairo after its restoration, on December 16, 2015. The restored mask -- now back in its display case at the museum -- was shown to journalists after a team of German experts worked on it for more than two months to remove a crust of dried glue from the beard of the priceless relic.   AFP  PHOTO / MOHAMED EL-SHAHED / AFP / MOHAMED EL-SHAHED        (Photo credit should read MOHAMED EL-SHAHED/AFP via Getty Images)