EditorialFILE -- Tourists photograph the unfinished moai statues at Rano Raraku, the vast quarry on Easter Island, on Dec. 16, 2017. (Josh Haner/The New York Times)
EditorialAhu Tahiri, an " ahu" or ceremonial platform for moais, the Easter Island statues. The perfectly fitted stones, some weighing 7 tons, led Thor Heyerdahl to believe the original settlers were South American Indians. Today scientists say Easter...