From Saga to Science: American Vikings

Recent news of Norse remains in North America has rekindled my interest in what was once the main theme of this blog, the connections between literature, myth, and archaeology. Much of Viking archaeology has been spurred by scholarship of medieval literature; some of the most notable archaeological discoveries of the past two centuries have been those guided by details from the classical and medieval epics. The impulse to look for archaeological roots to literary sources like the Icelandic Sagas, with their accounts of Viking adventures spanning Norway, Iceland, Greenland, and America, illustrates the power that stories have over even the most academic of imaginations, causing researchers to embark on long quests for sites like the lost Viking Vinland.

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Reenactment of the Viking landing at L’Anse Aux Meadows. Photo credit: Joyce Hill

The Icelandic Sagas are prose histories written in the 13th and 14th centuries describing events that took place in the 10th and 11th. While most of the sagas focus on folk stories or family histories, some depict the Viking expansion westward: the settlement of Iceland, Greenland and the western land known as “Vinland.” Stripped of their supernatural trimmings of ghosts and seers, the Saga of the Greenlanders and the Saga of Eirik the Red tell similar stories of the arrival of Icelanders on the northeast coast of America, at first the accidental result of the harsh storms of the northern Atlantic, but later a deliberate attempt at colonization, four centuries prior to Columbus.

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Rescue Operations: the Libraries of Timbuktu

When rebels and militants took over Timbuktu in 2012, the world nearly saw a repeat of the tragedy of the Library of Alexandria: hundreds of thousands of priceless medieval manuscripts were in peril in the occupied city. Under the eye of militants intent on destroying the centuries of Sufi scholarship contained in Timbuktu’s libraries, mausoleums, and mosques, a courageous group of Malinese set out to protect the books.

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Ondatra zibethicus

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Between our beach and the one attached to the cottage next door is a shrubby bank that slides steeply down to the water, where fallen logs, overhanging branches, and trapped driftwood create a small warren for another, mostly unseen neighbor. Occasionally I’ve spotted a small dark head plowing through the water, and the glean of a wet back, or a quick splash as the muskrat slips off a log into the lake. Fortunately, this Rat doesn’t seem to like messing about in boats; our sailboat is pulled ashore just next to this little wooded area, and it would be an interesting experience to find a stowaway half-way out into the lake.

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This fall, while I walking on the beach (with a dauntless dog that quite enjoyed the cold water), I found something besides seaglass or shells – a matched set of jawbone halves washed up on the shore. They were washed clean, and clearly rodent, with large pointed front teeth and the flat molars of an herbivore. The large separation between the front incisors and the cheek teeth is called a “diastema;” the remaining incisor has the characteristic orange tint of rodents. Given the size of the bones and the location, they are likely from a muskrat; a squirrel or rat would be smaller, a beaver larger. I hope it isn’t our neighbor; I’ll be keeping a look out in the spring. In the meantime, Ondatra makes for excellent sketchbook fodder.

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Earthshaking Elephants

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(Reposted from The Earth Story, https://www.facebook.com/TheEarthStory/posts/977645872296457:0)

When elephants and humans collide, it’s not always the humans that come out on top. Elephants that wander into farmland can do significant damage to crops, fences, and even buildings, sometimes injuring or killing people. Besides the damage itself, the antagonism created with the residents can hinder conservation efforts in rural areas. Some projects have attempted to keep elephants out using beehives – elephants are deathly afraid of bees – but another approach presented at last week’s meeting of the American Geophysical Union takes advantage of the way elephants communicate. When an elephant sounds a warning call, it uses infrasound – low frequencies that are below human hearing but can travel long distances – as well as vibrations that other elephants feel through their feet. Some attempts have been made to scare elephants away from villages by broadcasting infrasound imitations of alarm calls, but Sue Webb and colleagues at the University of Witswatersrand think that the lack of accompanying seismic rumble is enough to clue in clever elephants that it’s a false alarm.

To that end, they deployed a seismic study to record elephants trained to “rumble” on command. After a few false starts when the elephants investigated the new equipment too closely, the sensors were buried to keep them out of harm’s way and the signals were recorded. Audio of the elephant’s rumble is in the BBC article linked below – the audible portion, at least. The team is still reviewing the results, but they are already seeing unique seismic signals that are far-traveling. If the group from Wits is right, then coupling both an infrasound signal and a seismic one together may be enough to trick curious pachyderms into staying out of habited areas, making life safer for both them and us. Turning their findings into a useful, affordable solution that can be easily deployed may take more work, but understanding the details of how elephants really communicate is a step in the right direction.

The researchers also recorded some different data – what happens when a baby elephant learns about birds for the first time: http://bit.ly/1VNhDjn
The video was taken by Sue Webb, and proceeds from the ad venue go to supporting the research project.

Image: PJ KAPDostie
Sources:
Sue Webb, AGU presentation: “Investigating the seismic signal of elephants: using seismology to mitigate elephant human conflict”
BBC: http://bbc.in/1OgLFuS