Enlarge / New research lends further credence to the "population crash" theory about Easter Island being just a myth. (credit: Arian Zwegers/CC BY 2.0)

For centuries, Western scholars have touted the fate of the native population on Easter Island (Rapa Nui) as a case study in the devastating cost of environmentally unsustainable living. The story goes that the people on the remote island chopped down all the trees to build massive stone statues, triggering a population collapse. Their numbers were further depleted when Europeans discovered the island and brought foreign diseases, among other factors. But an alternative narrative began to emerge in the 21st century that the earliest inhabitants actually lived quite sustainably until that point. A new paper published in the journal Science Advances offers another key piece of evidence in support of that alternative hypothesis.

As previously reported, Easter Island is famous for its giant monumental statues, called moai, built some 800 years ago and typically mounted on platforms called ahu. Scholars have puzzled over the moai on Easter Island for decades, pondering their cultural significance, as well as how a Stone Age culture managed to carve and transport statues weighing as much as 92 tons. The first Europeans arrived in the 17th century and found only a few thousand inhabitants on a tiny island (just 14 by 7 miles across) thousands of miles away from any other land. Since then, in order to explain the presence of so many moai, the assumption has been that the island was once home to tens of thousands of people.

But perhaps they didn't need tens of thousands of people to accomplish that feat. Back in 2012, Carl Lipo of Binghamton University and Terry Hunt of the University of Arizona showed that you could transport a 10-foot, 5-ton moai a few hundred yards with just 18 people and three strong ropes by employing a rocking motion. [UPDATE: An eagle-eyed reader alerted us to the 1980s work of Czech experimental archaeologist Pavel Pavel, who conducted similar practical experiments on Easter Island after being inspired by Thor Heyerdahl's Kon Tiki. Pavel concluded that just 16 men and one leader were sufficient to transport the statues.]

Enlarge / Artificially modified skull from a female Viking individual in Havor, Hablingbo parish, Gotland. (credit: © SHM/Johnny Karlsson 2008-11-05/CC BY 2.5 SE)

German archaeologists discovered that the skulls of three medieval Viking women found on the Swedish island of Gotland in the Baltic Sea showed evidence of an unusual procedure to elongate their skulls. The process gave them an unusual and distinctive appearance, according to a paper published in the journal Current Swedish Archaeology. Along with evidence that the Viking men from the island may have deliberately filed their teeth, the discovery sheds light on the role body modification may have played in Viking culture

When people hear about Viking body modification, they probably think of Viking tattoos, particularly since the History Channel series Vikings popularized that notion. But whether actual Vikings sported tattoos is a matter of considerable debate. There is no mention of tattoos in the few Norse sagas and poetry that have survived, although other unusual physical characteristics are often mentioned, such as scars.

The only real evidence comes from a 10th century travel account by an Arab traveler and trader named Ahmad Ibn Fadlan, whose travel account, Mission to the Volga, describes the Swedish Viking traders ("Rusiyyah") he met in the Middle Volga region of Russia. "They are dark from the tips of their toes right up to their necks—trees, pictures, and the like," Ibn Fadlan wrote. But the precise Arabic translation is unclear, and there is no hard archaeological evidence, since human skin typically doesn't preserve for centuries after a Viking burial.