10 most difficult eth­nol­o­gy riddles

There is only one ahu (group of statues), Ahu Akivi, with moai facing the ocean. It is unusual also by being one of the few inland ahus. At all other ahus (including all coastal ones) moai face inland.

According to the 2000 census, 281,069 U.S. citizens self-identify as Cherokee. These numbers are closely followed by Navajo (269,202). Other tribal groups are considerably smaller, only Sioux (108,272) and Chippewa (105,907) exceed 100,000.

The Scriptures tell us that Jesus didn’t look different from an ordinary Jewish man of His time. (No, they do not. Jesus was descended from the Galilean Mary.) Any other color of eyes than brown would have been surely noted down. In the 2004 movie, The Passion of the Christ, Jesus was portrayed by Jim Caviezel who had his blue eyes digitally changed to brown.

The warrior carries a weapon called Nifo'oti, typical to the area. It's a mixture of a traditional weapon used in Oceania with an agricultural tool imported by Europeans.

People appearing in the south-east of Estonia. The ancient ethnic group, which has a distinct culture, language and other beliefs, was also able to preserve its traditions, even though it was torn out of Estonia and incorporated into the USSR. The name of the group is most likely from the Estonian language, from the phrase "ei see, ei too" ("ni ni, sio"), which meant "neither an Estonian nor a Russian".

The Romani flag is the international flag of the Romani people. It was approved at the first World Romani Congress (WRC), held in Orpington in 1971. The flag consists of a background of blue and green, representing the heavens and earth, respectively; it also contains a 16-spoke red chakra, or spoked wheel, in the centre, representing the itinerant tradition of the Romani people.

The Zulu are the largest ethnic group in South Africa, with an estimated 10–12 million people living mainly in the province of KwaZulu-Natal.

The Ainu are an indigenous people in Japan, today almost completely assimilated by the Japanese. The Ainu women tattooed their mouths, starting at a young age with a small spot on the upper lip, gradually increasing with size. When they reached age 15–16, their tattoos were completed. Thus were they qualified for marriage.

Fa'afafine are a commonly well-accepted third-gender people of Samoa. They are male at birth, and explicitly embody both masculine and feminine gender traits. In Samoa, there is very seldom ridicule or displeasure towards a biologically male child who states that they are a girl.

Han Chinese settling in Taiwan started in the 13th century, and today aborigines form only 2% of the population. The Aboriginal languages of Taiwan show much greater diversity than the rest of Austronesian put together, leading linguists propose Taiwan as the source of all aborigines.