Be Right Back.

Dear readers,

Anna’s Bones is bidding farewell to the blogosphere.

For now.

My real world pilgrimage (otherwise known as ‘PhD’) beckons me to hit the trails, as adventures worldwide (otherwise known as ‘data collection’) await me.

But fear not, my boney fans, Anna’s Bones will be back soon after her travels, and fill these pages once again with wondrous stories about bones, evolution… and all the worlds in between.

In the meantime, she’ll be active as ever on Facebook, so do follow for the latest news on paleoanthropology and evolution… !

See you soon,

Anna Bones

The Bone Room

Last week, my housemate’s friend, Yemisi Blake, asked if he could snap some photos of me in ‘my bone lab’. These would feature in his photography project entitled ‘Great British Youth’ which showcases British youth in their work environment.

Being neither of those things, I quickly acquiesced. The narcissist in me, only too pleased to play muse to a camera lens and unbothered by the small details, forgot to communicate my age and background until halfway through the shoot.

Since the photos will not be displayed in the exhibit, I’m showcasing them here instead, in my most self-indulgent blog post to date.

These photos are an homage to a 13 year-old girl, who once solemnly declared to her parents that she’d grow up to be a ‘paleoanthropologist’, and somehow, at 29, has managed to make a living out of playing with old bones.

This is my tribute to my love for bones, evolution… and all the worlds in between.

Thank you Yemisi!

[Photos by Yemisi Blake www.yemisiblake.co.uk]

A Reason to Smile

Photo credit: Quim do Porto Photography 

“The purpose of our lives is to be happy” – The Dalai Lama

If there’s one thing I’ve learned in twelve years of visiting Thailand, it’s this: when you report your lost suitcase to a member of Thai airways and she smiles reassuringly at you, be scared… Be very scared. Likely the smile means she has absolutely no idea where your suitcase has gone, even after an extensive exchange with her walkie-talkie, nor does she have any idea how to find it, so she smiles and nods reassuringly at you. It is also likely you will leave the airport with a care package comprising of socks and whitening cream. This smile also means you will most likely spend the next few days calling various customer service numbers, possibly even using high pitched sounds with the customer care representative, only to find out that really you should just calm down, lady, because in Frankfurt alone there are some 20,000 stranded suitcases, and you are mighty lucky to be in a country where the official farang dress code is a bikini and a coconut.

So smile. You are, after all, in the ‘Land of Smiles’.

The Thai language, in fact, recognises over a dozen different types of smiles. These range from the jovial “I’ve-just-won-the-lottery” smile (yim cheuat cheuan), to the defeated “my-situation-is-so-bad-I-might-as-well-smile” smile (yim soo), to the above-mentioned “sorry-we-lost-your-luggage-but-please-don’t-get-angry-with-me” smile (yim haring.) To the unacclimatised westerner, in whose culture a smile is most often synonym of happiness, arriving in a land where smiling is the Siamese equivalent of accessorizing, Thailand seems like a tropical utopia, a bubble of cerulean bliss, a sanctuary for the joyful, a celestial perch where friendly grins come to nest. Only after the painful realization that Thais can dispense equally as elegant smiles when greeting you for the first time as they do when giving you the proverbial finger, does the bubble burst forever.

But what’s in a smile?

In the western world, where social conventions do not necessarily require us to walk around with one hanging from our cheeks, smiles are essentially organised into a simple dichotomy: real or fake. Indeed, the modern study of human facial expressions, a field initiated by Darwin with his work on “The Expression of the Emotions in Man and Animals“ (1872), recognizes only two kinds of smiles: the truthful ‘Duchenne smile‘ – named after the French physician Guillaume Duchenne, who studied the physiology of facial expressions in the nineteenth century – and the fake ‘social smile‘ (also referred to as the ‘Say Cheese’ smile.)

Julia Roberts’ real and fake smiles. Can you spot the difference? Take the test here.

Nevermind trying to accurately identify the 13 Thai smiles, studies have shown that most people are completely incompetent at discriminating between a contrived and an authentic smile. For this reason, scientists have devised a coding system called the Facial Action Coding System (FACS) in order to distinguish between the genuine and the fake. Results from various studies show that despite the differences between the two being too subtle for the average person to pick up on, there are significant life-long repercussions relating to life satisfaction, life quality and even marriage quality depending on whether or not you are an authentic smiler or a ‘say cheese’ smiler.

Although the facial outcome is very similar, a fake and a genuine smile actually result from the action of different muscles and even different brain areas. Fake smiles can be performed at will, because they are controlled by the conscious part of the brain and prompt the zygomaticus major muscles in the cheeks to contract – these are the muscles that pull the corners of the mouth outwards. Genuine Duchenne smiles, on the other hand, are generated by the unconscious brain, so are automatic. In this case, the muscles that raise the cheeks – the orbicularis oculi and the pars orbitalis – also contract, making the eyes crease up, and the eyebrows dip slightly. Perhaps then, the eyes are not ‘windows to the soul’, but rather decorative windowsills, bending to shape in consonance with our mood.

Furthermore, studies have shown that people with positive emotions are happier and have more stable personalities, more stable marriages, and better cognitive and interpersonal skills than those with negative emotions throughout their life. It has also been shown that happy people live on average 14% longer than persons who report that they are unhappy, they enjoy an increased longevity of between 7.5 and 10 years, they are also less likely to commit suicide, and are less often the victims of accidents. Duchenne smiling correlates so well with these variables, in fact, that studying smile intensity in childhood and college yearbook photos is enough to successfully predict lifespan!

A chimpanzee smile

But what is the use for this peculiar muscle contraction after all? If only authentic smiles are predictors of positive feelings, why go through the trouble of showing off our ivory beads when we are not genuinely happy?

Some research has shown that smiles can elicit cooperation among strangers in a one-shot interaction, because smiling evokes trustworthiness. Given that the smile is thought by some to have evolved from the submissive ‘show of teeth’ in primates, it doesn’t seem surprising then that a conscious lifting of the ends of our mouths may have been evolutionary advantageous since it can arouse positive reactions in others during social interactions. If this is true, it would explain why smiling seems to be an innate behaviour, and why children who are born blind show the same kinds of smiles under the same situations as sighted people. Thus, adapted from the simian toothed open-mouth grin, the smile evolved somewhere along the line into its present form: a friendly string of pearls dangling ear to ear from our naked human faces.

I’m not sure what kind of facial expression I was wearing during the interchange with the Thai Airways official, but I’m guessing I gave her some sort of friendly open-mouth tooth display, for which no name in Thai or any other language exists. I had withstood 2010’s wrath, I had survived Heathrow’s chaotic vortex, and I had endured 12 hours of imprisonment in a flying capsule that barely made it out of London’s snow, so when I found myself just ten minutes away from all-you-can-take sun, heat, countless coconut trees and a million other reasons to smile, I accessorized accordingly. My lips stretched outwardly like a happy hammock into my receding cheeks that now bunched up like two blown-up cushions at the sides of my face… and I stepped, luggageless, onto the tarmac wearing my best Duchenne to date.

Anatomy of a Square

[Click here for the the first part of the story: Road to Rudabanya]

“In Euclidean plane geometry, a square is a regular quadrilateral. This means that it has four equal sides and four equal right angles. […]  In spherical geometry, a square is a polygon whose edges are great circle arcs of equal distance, which meet at equal angles. The angles of such a square are larger than a right angle. […] In hyperbolic geometry, squares with right angles do not exist. Rather, they have angles of less than right angles. Larger squares have smaller angles.”

“I can tell you’ve done this before. You take good care of your square,” said Big Dave. With his tobacco voice and worn eyes, there was something about Big Dave that imposed respect, like an oversized lobster thrown back at sea. Wrinkles grew across his face like a leafless willow tree, scabs and memories quietly sitting side by side on its branches. At 70, he wore them with pride. In the field he was a towering sight, a gentle giant with a cigarette hanging from the corner of his mouth, hammering away at the gray marl in meditative silence. I didn’t take his compliments lightly.

It took me some time to understand that there is more to excavating than digging oneself into a hole. I used to work too fast, like I couldn’t wait to get to the bottom. In previous excavations I had even broken a few Paleolithic stone artifacts and missed large prehistoric rhinoceros molars under the clumsy strokes of my hurried tool. This time I wanted to put five years of practiced patience to the test. Sentences like follow the slope, keep it even and clean your square, all too familiar to budding archaeologists, ran like mantras in my head while I hit the screwdriver against the solid clay.

The site lay under the Hungarian sky like an open wound, a dozen or so bodies picking at it with sharp objects, like a pack of tiny rodents gnawing away at a carcass. From the inside, the pit looked like a multilayered podium, slumped backs sitting at different heights, labouring busily over their squares. In this overcrowded hole, bodies contorted under the pressure of invading limbs and heads from neighbouring squares, unable to be contained inside their one-by-one meter space. In the field, days moved to the sound of this human jigsaw puzzle reshuffling itself again and again on the muddy Rudabánya floor.

Apart from the trees and a turquoise lake shimmering seductively in the distance, which our acclimatised eyes barely noticed anymore, the site was remarkably unspectacular. It was easy to forget we were knee-deep in one of the most important sites in the paleoanthropological world. We were standing on the birthplace (or rather deathplace) of ‘Rudi’ and ‘Gabi’ (Rudapithecus hungaricus), two famous 10 million-year-old creatures and the closest things to the proverbial missing link between African great apes and humans.

Kneeling inside my square, like an inmate in a Japanese prison cell, my hands made their way down the earth’s skin, while my mind slowly escaped into the tiny crevices of the floor beneath my feet. Fieldwork has a way of warping time, of bending it into strange shapes you never knew it could have. It has a way of telescopically zooming into parts of yourself there aren’t any names for, like some overly curious surgeon probing in unwelcome parts of your anatomy.

I was momentarily rescued from my thoughts by the find of a partial Rudapithecus humerus, which lay between my square and Arthur’s. Fossils somehow have this remarkable ability to burrow in the most inconvenient of places, either on a complicated corner, on an edge, on a slant between two squares, inside the wall that won’t be excavated until next year. At the end of the season, the eastern wall would be left a veritable mosaic of fossils, sandwiched between multicoloured layers of dirt, bones of all sizes poking from mother earth’s epidermis like toothpicks. Most will never be rescued from their deathbeds.

Surrounded by clumps of strange teenage bodies, my mind recoiled unto itself. Days in the field were lived in silent introspection, interrupted only by the sound of sediment being shoveled away, the sound of rubble hitting an empty bucket, a metal tool hitting a rock, a hand swiftly swatting away a mosquito, a gust of wind, a bird. Mornings were spent under the spell of the 6:30 am wake-up call, stuck in that twilight space between an unnursed hangover and a coffee craving. The first break is at noon. No point in wondering about the time, there is always a disappointing distance between now and a break.

When a fossil is found, the human cloth breaks into a dozen uncoordinated pieces. Like a family of prairie dogs, heads peer up from the ground, a dozen pairs of inquisitive eyes turning to the location from where ‘is this something?’ is being uttered. No, it’s nothing, most of the time it’s nothing. A heap of dirty overheated bodies with bizarre tan-lines return to their labour, their unquestioning hands working the ground beneath them. There is a pause here and there; a pair of traveling eyes considers the menacing puddle accumulating on the plastic tarp hanging from above.

At lunch, I studied the lake below me while biting into a pista-covered hardboiled egg. I eyed it suspiciously, that copper-filled lake with its false blue-green promises. Exploited for centuries for its various metals and lignite, Rudabánya is now an exhausted, troubled and poverty-stricken land that gets its name from bánya, Hungarian for ‘mine’ and ruda, Russian for ‘ore’. The lake smiled at me like a hypocrite, concealing its evil secrets under a blanket of opalescent temptation. It was a remnant of a man-exploited world, men who had dug a hole and left, leaving behind a fistula of poisonous liquid that now had nowhere to go. I threw my leftovers in the bushes and turned my back to the lake nonchalantly, leaving it to play its tricks on others.

I locked my body back in place on my quadrilateral island. Taking shelter from unbearable teenage conversations with my headphones, I was left with the loudness of my emotions battling each other to pieces inside my chest. Grief, anger, doubt, insecurity and self-pity claimed me as their home, like naked crustaceans searching for a shell on foreign sea floor. There too was an evil lake inside of me, with poison pooling without escape. Feelings of abandonment, betrayal and loss weaved their webs inside of me, sad thoughts spun around and around, pulling me down into an infinity loop of melancholy.

Oui, l’enfer ce sont les autres, mais l’enfer c’est moi aussi.

It hadn’t always been like this. An eternity ago, the landscape had once smiled and flourished in the absence of man. Is this something? Yes, it’s something. Sometimes there is something. An Agriotherium femur, a deciduous Anapithecus canine, a Rudapithecus phalanx, a turtle shell, date pits, micromammal long bones, Chalicotherium something, a beaver other, pig this, squirrel that. As days went by, a picture of a lost world, where we now stood in knee-deep. It had not been the darkest before our dawn.

Rudabánya belongs to a time when the Carpathian Basin was covered with a shallow sea that covered large areas of today’s Hungary, in the late Cenozoic. Its shores were bordered by swampy forests, at a time when the weather was milder and more humid than today. The layers we now explored belonged to the Miocene, spanning from 24 to 5 million years ago, a period that saw the end of the connection between Eurasia and Africa, which allowed the hominoids in each continent to separate and follow their own independent paths. On one side the pongids evolved in Asia, and on the other the panids and hominoids in Africa, leading eventually to mankind.

Today, there is disagreement about the break-up point between the ape lineages, some believe the separation to have happened in Africa, where others believe it to have taken place Eurasia. David Begun, a wrinkleless-yet-just-as-intimidating man who led the National Geographic funded field season, champions the theory that the ancestors of African apes evolved in Eurasia. Whatever the version of events, it was this now half-eaten land that our Hungarian hominoid once called home.

A mix of black and sepia-toned rubble piled inside my bucket. I had reached the bottom of the black and red clay, both fossil-dense layers. Ahead of me, the quasi-barren ocean of hard grey marl awaited. Some days I envied those in the clays, delicately picking tiny secrets out of the ground with their oddly shaped dental tools. Some squares were so rich they were given names like the rice crispy square (a compact block of micromammal remains), or the graveyard square (whose complicated conglomerate of large carnivoran bones looked like the site of a massacre.). The grey marl, however, was a different game. It was a game of persistence, perseverance and patience. Easily overcome by discouragement and frustration, those of us serving sentences in these squares were under daily reminders from the more experienced that some of the better preserved and most important fossils had come out of this very soil.

By the end of the day, after hours spent in introspective confinement, the physical and mental landscapes collapsed into one another, like cartoon figures in a children’s pop-up book. No matter how much you follow the slope, keep it even or clean you square, it’s never up to you what the ground decides to yield. It all felt like a colossal metaphor for my life. The ground below me was showing me my faults, like a jester’s mocking finger demanding I connect the dots. I worked like I felt, as if for fear of losing I didn’t give enough before, and in name of the same fear, I was now afraid of letting go.

Back at the house, a circle of mangled bodies huddled over a fire after dinner. I sat in silence dodging the giggles and friendly complicities being exchanged around me, falling deeper and deeper under the hypnotic spell of the flames now dancing like possessed tribesmen inside the fire-pit. I contemplated the starless sky while my guts digested an unpalatable lesson: accepting that sometimes the biggest find, is not finding anything at all. Big Dave sat to the side, his ghostly presence watching over the crowd like a shepherd. He handed me a beer.

“Looks like it’s gonna rain.”

Stripped, Part III – ‘Back’

[click to read Part I, and Part II of my 'Stripped' series]



“Gosto das suas costas” – anonymous

I stepped out onto the street, still in a daze with those dreamy Portuguese words dancing in my head. A keychain dangled around my neck, the glittery ‘A’ bouncing off my stomach in a steady rhythm. A Sainsbury’s trolley full of bones dragged behind me as I marched towards the British Museum. Latte in hand and a smile on my face, I said: “I’m here. Where do I set up?”

It was London Anthropology Day. This was my first workshop.

I felt the blood rush towards my head. Everything was upside down. I adjusted my hands according to yoga instructions I had been given many years ago – “you have a very long back” I had been told. I tilted my head to the side to meet 50 pairs of very confused eyes staring intently at me… I was, after all, doing downward dog in a Paleoanthropology workshop.

“So you see, you really get the sense of how much longer our legs are in relation to our arms when you get on all fours. Apes on all fours don’t look this silly. And all of this because we are bipedal.” I said.

A human in downward dog and chimpanzee on all fours

I stacked my body back onto my legs, turning the room right side up again. My heels landed at the bottom of their multicoloured boots, in a painful reminder of the missing left insole, and as the weight of my torso came bearing down on my feet, my spine adjusted sorely over my uneven legs. With a supernumerary lumbar vertebra that gives my back its extra length, and a left leg 9 mm shorter than the right that gives my spine a slight sideways bend, my backbone is both a beauty and a torment. Concealing the discomfort from my audience, I secretly cursed this human condition as my lower back begged for downward dog again.

Like 24 little doughnuts piled one on top of the other, the human vertebral column, the hallmark of our species, remains among the most problematic structure of the human body. The lower back, in particular, which plays a key role in keeping the trunk erect and in equilibrium with minimal force, has both been described as an ‘evolutionary failure’ and as a ‘highly sophisticated gear system’. Stacked into a solid but bendable formation like a sturdy flower stem, the five lumbar vertebrae (or six…) are wedged into a lordotic curve that allow for both stability and flexibility in withstanding the forces generated by the weight of a heavy head and large torso over two stilt-like legs – a compromise achieved by a mechanism of interlocking facets, that just like a jointed toy snake, allow movement between the vertebrae in some directions while preventing it from moving in others.

The human S-shape vertebral column has two main curvatures, the thoracic kyphosis and the lumbar lordosis

But our locomotor repertoire of choice means we subject our lower backs to a great deal of bending stress throughout life – the most dangerous kind of stress for bony tissue – and because we can’t spend our lives in downward dog… we must pay the price in pain.

In fact, low back pain, or lumbago, is the most common type of back pain. It affects 80% of people at some point in their lives and accounts for more sick leave and disability than any other medical condition. In the U.S., lower back pain competes with the common cold as the leading reason why people see a physician; it is the number one cause of disability in workers under age 45 and is responsible for an estimated $20 to $50 billion annual expenditure in medical treatments and disability payments. Yet, in the UK,  19 in 20 cases of low back pain are classed as ‘non-specific’, because it is usually not clear what is actually causing the pain, and only about 1% are ever found to have severe causes.

The human lower back anatomy allows for a great deal of flexibility

A pain that has no cause, no cure, is not due to any physical abnormality yet plagues the whole of humanity? It is no surprise that lower back pain is described by the more spiritual as a part of our trial on earth, a burden we must endure in this physical life, only to be alleviated in the next celestial one.

But relief would have to wait for now. At least until I could locate my left insole.

“Was he bipedal?” asked a student while holding up an Australopithecus africanus skull. The room was now hot like an overcrowded yoga studio. I readjusted my back, and as I took the skull in my hands I wondered if ‘he’ had ever felt this way too…

And as it appears, he may very well have. It is likely that early hominids evolved a human-like lumbar lordosis around 3 million years ago, and they are even regularly quoted as having had six lumbar vertebrae – it was looking like, as far as my backbone was concerned, I had more in common with the africanus in my hand, than with the undergraduate opposite me.

However, individuals with six lumbar segments have only been observed in some gibbons and modern humans where they occur with a frequency of 2-8% in different populations, whereas great apes have only four or even three segments. The hominid axial skeleton shows many derived adaptations for bipedalism including an elongated lower back, both in number of vertebrae and in length; this stabilizes the upper body over the lower limbs by positioning the trunk’s centre of mass above the hip. In this case, the long lumbar spine of early hominids would have to be explained by the incorporation of a sixth vertebra during evolution, whereas the primitive condition of the common ancestor of great apes and humans is thought to be either five or four. However, this explanation requires us to accept the appearance and subsequent disappearance of lumbar vertebrae during our evolution – an unsavory explanation as far as the rules of evolution and parsimony go.

So much for my connection with africanus, my sixth vertebra was sounding more like a ‘fail’ than a ‘sophistication’… But at least there was yoga, and a very helpful 9mm thick insole to level me back.

I stepped back onto the streets, energized from the excitement of the workshop. The steady sound of the trolley wheels behind me, eating their way through the London pavement. As I moved away from the museum gates, the cheerful clinking of the shiny keychain ricochetted against my belly, to the pace of my slightly lopsided gait.

“Gosto das suas costas” I heard again.

I couldn’t tell where it was coming from, and its meaning was lost to me, but I smiled anyway. I slipped into a daze, under the welcoming July sunlight. The trolley’s wheels grew silent behind me as did the clinking of the keychain. I felt my feet float away from the ground and the weight of the world being lifted from my every vertebrae, until my back no longer hurt. I heard it again, this time in English, the same exact blurred sentence playing in a loop: “I like your back.” My whole body drifted away from the concrete floor as the city noises grew distant beneath my multicoloured boots. I closed my eyes and let myself go. My head was spinning under the spell of those hazy words that now multiplied below me: “I like your back. I like your back.” From one came many, faster and faster, louder and louder, like the beating of a drum, thumping away until I could not longer ignore them. My body suspended over the cityscape, I finally opened my eyes to meet the voices now shouting at me…

Underneath me there was London, a warm and sunny London, spreading like an enormous worn straw mat, and on that straw mat there were people, a crowd, no, many crowds, countless crowds expanding as far as the eye could see, all coming together into a friendly cohort of toy soldiers calling my name and chanting in unison…

“Welcome back! Welcome back!”

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Author’s note: scientific facts aside, much of the account has been heavily fictionalised.