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Archive for December, 2017

Back in November 2016 I got an exciting email from colleague Dr. Richard Thomas, who was building a team of experts for a proposed documentary on Jumbo the elephant; the famed proboscidean of the Victorian era (and arguably most famous elephant of all time, first international celebrity animal, etc.). I knew him from social media and from our mutual interests in chicken anatomy and evolution. And that exciting email, for once, worked out! Over coming months I chatted with the film producers and they could see a place for me in the programme, contributing my expertise in elephant (postcranial) anatomy, locomotion, health/welfare etc. Lo and behold, in May 2017 I met Sir David Attenborough at Heathrow and we flew out to New York City to film with the skeleton at the American Museum of Natural History. And to cap it off, I got to meet another childhood science communication hero: Professor David Suzuki of CBC’s “The Nature of Things“– my adrenaline levels were sky high!

Brooklyn neighborhood by our hotel. Lots to do!

The show has aired in the UK and is coming very soon to Canada and the world (details below). Here’s my part of the story.

Stomach-Churning Rating: 3/10– bad bones but no blood.

We filmed from 15-19 May 2017 at the AMNH’s warehouse of mammalian skeletal remains, which is housed deep in the Brooklyn Army Terminal; a picturesque site in and of itself. And it is a site with a lot of history— WWI and II, Elvis and more.

It was a hectic week of the usual documentary stuff: repeat the same lines and motions again and again from different angles and with different paces and intonations (I cannot help in these cases but think about the Simpsons “Fallout Boy” episode), from ~9am-5pm, with plenty of downtime watching setup or other bits being filmed. I’m used to all that. But having the time to peer around the collection and chat to Richard and colleague Dr. Holly Miller (handling the tissue isotopes side of the story) about Jumbo’s skeleton was a lot of fun during downtime and filming itself. Not to mention the utter joy of studying one of the most famous museum specimens ever, and an animal widely held to be one of the largest of its kind, with much mystery surrounding its history despite its fame. (Wikipedia does a fair job of summarizing some of this)

Here are some photos to tell the story:

Photo of the team, courtesy of Infield Fly Productions (CBC production, “Jumbo: The Life of An Elephant Superstar”.

The Brooklyn Army Terminal, with a view of the harbour beyond.

Inside the terminal: old army staging area and an evocative wooden Liberty/tank artwork.

Army terminal cat. Shipping still comes through the terminal so I guess there are plenty of rats and handouts from cat-lovers to keep it going. I miss our cats when I travel so this moment was appreciated.

Whale skulls and other specimens inside the AMNH warehouse.

First view of Jumbo’s remains.

Photo opp with Sir David.

Photo opp with Prof Suzuki.

That’s the setup. I’ve done ~15 other documentary episodes/shows but this was like nothing else– simply an awesome experience.

Now the delivery: we set to studying those bones. We’d seen photos before, and Henry Fairfield Osborn had illustrated the specimen as his type of “Elephas africanus rothschildi” (Sudanese elephant; no longer valid but those were different times– it’s now just a nicely preserved Loxodonta africana africana), so we knew some of what to expect.

Looking at Osborn’s classic monograph. Oddly he didn’t address the GLARING MASSIVE PROBLEMS WITH THE TEETH!

Skull with terrible tooth pathologies– and let’s play spot Mumbo, my daughter’s toy elephant! He might even appear in some TV footage!

We had noted some serious issues with some bones (pathologies). I won’t spoil the message here but will show some images. I know some experts have voiced issues with how the tooth pathologies/growth were explained in some footage but I can’t address that here; it’s not my expertise. The important point to me is that the teeth are incredibly messed up and that can easily be linked to bad diet and other management/health issues, as the documentary explains.

Jumbo’s torso in left side view. Glorious preservation.

Right forelimb, showing that the “growth plates” (epiphyses”) were not all fused, consistent with Jumbo still growing– as expected for an African male elephant in his 20’s.

Right elbow with some pathologies consistent with degenerative joint disease.

Surprisingly, Jumbo’s feet were not in nasty condition in terms of pathologies. I’d expected to see that. They’d been painted and drilled for mounting, but were not riddled with arthritic changes that I could see.

Strange bony plaque on the left pelvis (hip) region; something I’d never seen before in any elephant (and I’ve seen many). Why? The programme offers a reasonable explanation.

Jumbo’s right hip, with bad erosion of the bone and thus presumably the overlying cartilage. Ouch!

Strange extra prong on one right rib in Jumbo- we didn’t figure that out. It could conceivably be natural variation.

So, poor Jumbo suffered some jumbo-sized problems, and in complex ways. That’s just scratching the surface of what his skeleton tells us, and there’s plenty more in the show plus plenty more we can say later– there’s real science that came out of this programme! I was surprised to find how little had been stated anywhere in the scientific literature about Jumbo’s pathologies.

Sad as Jumbo’s skeletal story is, the broader story of his life and death is sadder still. For purposes of time I don’t think any of the three versions of the show will get to delve into how Jumbo’s mother may have been slashed to death by a broadsword, as the story below describes was the ancient practice:

I’d hate to be “so pestered by a popinjay”, too.

Adding insult to injury, we can reflect on how Jumbo was taken from the Sudan to the east (across the Suez), then on boat to Italy and then overground to Paris, where he lived for a little while until the zoological garden sold him to London. Luckily Jumbo avoided becoming a meal to starving Parisians during the Prussian siege of 1870-1. So he did not become elephant consommé like some of his co-captives did. The more one learns about Jumbo’s life and the life of elephants in captivity in the 1800s, the more harrowing the tale becomes.

Jumbo is THE celebrity elephant. His name has come to mean ‘big’ and ‘bombastic’, from applications to jumbo jets to hot dogs and other (darkly ironic) forms of consumption and extravagance. He has had a jumbo effect on Western culture, but also symbolizes the complex human-elephant relationship, such as the inspiration for “Dumbo’s” own sad story. We love elephants but our fascination with them can also be their undoing, such as poaching for the ivory trade or mistreatment in captivity. Jumbo’s story writ large is also the story of elephants, and our story to learn from. If anything comes out of my participation in the Jumbo documentary for the public’s benefit, I hope it is increased empathy for how we interact with elephants. They are like us in many ways (maybe over-emphasized with anthropomorphism in many accounts), but also unlike us (maybe even unfathomable) in not only their size and anatomy but also in aspects of their prodigious intellect, emotions and social structure. Elephants aren’t just jumbo spectacles. They are jumbo responsibilities for humans now that we dominate the planet so much.

Want to catch a version of the Jumbo show? I’ll try to keep this list up to date:

BBC iplayer now: https://www.bbc.co.uk/iplayer/episode/b09jcxrj/attenborough-and-the-giant-elephant

BBC One: 5:05pm on January 31st

CBC: 8pm on January 7th– trailer is here:

http://www.cbc.ca/player/play/1115035715562

And the international version is coming soon, plus the above versions surely will circulate globally in some ways.

Have a jumbo time (in a good way) in the rest of 2017 and onwards into 2018!

-John

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An epiphysean Sispyhean task today: solve this mystery that has been bothering me for >15 years. It’s about bird knees. Read on.

Stomach-Churning Rating: 1/10- bones and brief words. Nothing to worry about.

Here is an ostrich. I was interviewing undergrads the other day and looked up to see it, then thought something like: “Oh yeah, that little bit of bone really bothers me. I cannot figure it out.” What little bit of bone?

Right leg, side view, ostrich…

This little bit of bone. Zooming in on that ostrich’s knee:

Who am I? (femur above; tibiotarsus below; “PTE” is the crest of bone with the white arrow on it)

The little bit of bone is not talked about much in the scientific literature on bird knees. But we know it’s there and it is part of the composite bone called the tibiotarsus (ancestral tibia, this bit of bone, and the proximal tarsal [ankle] bones on the other end; the astragalus and calcaneum of earlier dinosaurs).

What is it? We call it something like the proximal tibial epiphysis (PTE for short, here). An epiphysis is an end of a bone that fuses up with the shaft during growth, around the time of skeletal maturity; ultimately ending longitudinal (length-wise) growth of that bone. Mammals almost ubiquitously have them. So do lizards and tuataras. And some fossil relatives. Not much else– except birds, in this particular region (the two ends of the tibiotarsus; also in the foot region; the tarsometatarsus; which also has its share of mysteries such as the hypotarsus; I won’t go there today). You can see the PTE in mostly cartilaginous form if you take apart a chicken drumstick.

This PTE, like other well-behaving epiphyses, fuses with the tibiotarsus in mature birds, forming one bone. But the young ostrich’s knee above shows the PTE nicely; and other living birds show more or less the same thing.

It begs for explanations. I’ve talked about it in a few of my papers. But I’ve always punted on what it really means– does it have anything to do with the patella (they appear at similar times in evolution; we know that much, roughly)? Where does it come from, developmentally? (we sort of know that but more work is needed in different species and in high resolution) When did it evolve? What does it tell us? Why is it there in living birds and almost no other extinct birds/other dinosaurs? Does it have anything to do with why birds, during their evolution, seem to gradually increase the fusion of skeletal elements or ossify new ones (tendons, kneecaps, etc)? Why here and not in the femur or several other long bones of birds? How much do these PTEs vary between (or within) bird species?

This is the challenge in the post’s title. I present to you: solve this puzzle. Developmentally, biomechanically, evolutionarily, genetically, whatever– why does this PTE happen? There are hints– e.g. this paper proposes why growth rates of long bones favour the formation of “secondary centres of ossification” like this. But I’m unable to satisfy myself with any solutions I can find. Maybe you can complete The Bird Knee Challenge?

Have a go at it in the Comments below! There are plenty of papers or even a grant or something involved in sorting out this single mystery; one of the many basic mysteries about animal anatomy.

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