Boston, Terror, and Women in STEM

A couple of years ago I stood near the bottom of Meteor Crater in Arizona and stared at a fist-sized chunk of rusting iron embedded in the crater wall, a remnant of the ~50-meter-diameter nickel-iron meteorite that slammed into the Earth about 50,000 years ago.  When an impact crater is formed, a lot of things happen at very high temperatures and pressures – some of which we still don’t really understand – and one thing that’s often left behind is an “intimate mixture” of blown-off meteoritic material from the impactor and beaten up native rock from the impact site.1  In the case of Meteor Crater, formed in the same sedimentary sequence as the Grand Canyon, you could hardly ask for two more different rock types to be smashed up and slammed together by cosmic chance.

That is the closest analogy I’ve found so far to express how I feel about my trip to Boston last week.  My thoughts are an intimate mixture of two completely different events that I would normally never group together but now can’t separate:  the Boston Marathon bombings, followed by the manhunt for the Tsarnaev brothers, and the 2013 Women in Aerospace Symposium at MIT.  Unlikely bedfellows, no?

I found out about the Boston Marathon bombings at about 12:30pm last Monday – about 40 minutes after they happened – and I spent the rest of the day trying, and sometimes failing, to hold it together enough to get through everything I needed to do.  I was stuck (still am) on a problem in my research and also preparing slides for the talk I would give on Thursday at a symposium for female grad students working in aerospace or space science.  I never find it easy to simultaneously work on fixing a problem that’s buried in the details AND step back to look at the bigger picture.  Random fits of tears didn’t help.

marathon

My memory of the Boston Marathon, from a few years ago.
(also, proof that I should probably practice drawing people =/)

It’s hard to explain why I felt so personally affected.  No one I know had been injured in the attack.  In the four years that I lived there, I only ever went to watch the Boston Marathon once, but once was enough to leave a lasting impression.  I found it hard to hold it together on that day too, not because it was sad in any way but because it was so completely full of positive emotion.  Here were these people who had decided to do something hard – ridiculously hard – just for the sake of doing it, and this crowd full of strangers had come out to cheer them on and to share their seemingly unlimited reserve of enthusiasm and support.  It was a huge concentration of shared passion and goodwill – it was amazing.

Hearing what happened last Monday, that someone could be there, of all places, and want to hurt people, knocked the wind out of me a little bit.  My idealism took a hit, and I think I’m still mourning that.

And then, of course, I went to Cambridge for a few days.

Honestly, I wasn’t worried about going.  I figured it was actually a pretty safe place to be, given all the attention and security, and anyway we’d be at MIT, far away from the marathon finish line in Boston.  Everyone knows now how that turned out.

But before all the terribleness happened, I had a really great experience getting to know a group of other grad students in science and engineering, meeting a few (female!) role models in academia, and talking about the kinds of issues and decisions we’re faced with as women and as early-career professionals.  I don’t want to dwell too much on the single-genderedness of the symposium – men face problems in academia too – but it was really refreshing to be in a room full of female engineers and scientists for once.  It almost never happens.

Lately, I’ve been hearing all kinds of negative things about academia (both science and humanities), but there was none of that here – a completely different attitude.  I don’t know what it means for me exactly, but it did shake up my outlook a bit, and the discussions made me realize that many of the challenges in grad school that seem so intense and so specific to me (to name a few:  maintaining confidence that I’m on the right path in solving a problem; the irrational but almost-unsquashable fear that someone will “find out” that I’m not actually as good as they thought I was; difficulty balancing work stuff and life stuff) are really universal issues.

At one point in a panel discussion, one of the professors mentioned that undergraduate women at MIT sometimes say that they think they were only admitted to fill a quota.  Hearing that was like being punched in the gut.  I was one of those girls; I remember thinking that exact thing.  Is it really so common?

Yeah, I really felt like this...how dumb is that? I wish I could shake younger-me to snap her out of it, but it seems like many other young women might feel the same way.

Yeah, I really felt like this…how dumb is that? I wish I could shake younger-me to snap her out of it, but it seems like many other young women might feel the same way.

I must have gotten over it at some point because I had forgotten feeling that way, but now it seems like that insecurity is not so different from the kinds of insecurities I face today, and maybe I shouldn’t be so hard on myself for all the things I’m not perfect at.  How terrible is it that an amazing thing like getting into the college of your dreams could be the seed of so much self-doubt?

It gave me a lot to think about.  Between all of that and my presentation (which went pretty well I think) and meeting astronaut Bonnie Dunbar and having a really nice dinner, it was an awesome day.  I went to bed feeling really, really good.

And woke up to a nightmare.

Sean Collier, an officer of the MIT Police, was shot in his cruiser two blocks from our hotel, at an intersection my husband had walked through just a couple hours earlier.  We’d heard the sirens but hadn’t thought anything of it, and by the time I found out what had happened, my family was already clamoring to talk to us and I’d gotten half a dozen text messages from worried friends.  MIT was closed, the city locked down.  The second day of the symposium was canceled.  No one knew for sure what was going on, or if there were more accomplices, or if it was safe to go outside.  It was Scary.

mitpolice1And there wasn’t much to do but wait.  It didn’t take long for someone to suggest that we continue the symposium in some smaller way – many of us were in the same hotel, after all.  So we piled into a hotel room, collected presentation slides in a public Dropbox folder, and set up a Google hangout for others to join us online.  Prof. Dava Newman showed up with a projector not long after we started and soon, aside from the fact that people sitting on the left-side bed had to be careful of jiggling the projector and aside from the almost-certainly-just-garbage-truck sounds from the street making us jump every so often, the second day of the symposium was really humming along.  It was not at all normal, but it felt good to try.

All in all, this was a very odd trip to Boston and I’m still processing it.  What I’ve taken away – from both events – is that now is the time to figure out what’s important and I should be focusing on that more than anything.  Carpe diem, and all that.  It’s easy to get caught up in silly things, or to be discouraged by bumps in the road, but the right thing for me is out there, and it really is within my grasp.  I don’t know what’s going to happen tomorrow, so I might as well choose to be happy today.

makeshiftsymposium

Left: Lana Osusky and Dava Newman prepping for Lana’s talk
Right: other makeshift-symposium attendees, from left to right:
Back row: me, Stephanie Coronel, Elizabeth Jens
Front Row: Jess Chang, Julia Cole, Shoshe Cole (no relation), Laura Stiles

 

 

  1. To get a little bit of history in:  Whether or not the iron impactor was destroyed in the collision that formed Meteor Crater was a very important question in the early 20th century.  G. K. Gilbert thought it should be buried beneath the crater, and when he couldn’t find it he concluded that it wasn’t an impact crater at all, but the result of a subterranean steam explosion.  D. M Barringer thought it should be there too, and purchased the land intending to mine the iron and make a fortune.  In reality, almost all of the impactor was vaporized in the collision, and Barringer passed away in 1924, nearly bankrupt.
Posted in Reflections

Lightweight Champs in Poster Form

Here’s the poster version for my latest episode – you can follow the star path or look up something specific (or watch the video)!

Eddington-16

Posted in TA Episodes

Episode 3 – Lightweight Champs!

A situation of some gravity…

Script and image sources are listed below.

Posted in TA Episodes

Sources for Episode 3

Lots of good stuff this time around! I have to send a special thank-you to Daniel Kennefick for weighing in on (no pun intended) the script, and to my husband, Jon, and all of the PHDtv team for providing feedback on the various drafts.

Sources:

Original publication of the expedition results: Dyson, et al.: “A Determination of the Deflection of Light by the Sun’s Gravitational Field, from Observations Made at the Total Eclipse of May 29, 1919” (This is also where the final figure plotting the data comes from.)

1979 Re-analysis of the Sobral data:  Harvey, G. M.: “Gravitational Deflection of Light: A Re-examination of the observations of the solar eclipse of 1919”

Two great articles by D. Kennefick: “Not Only Because of Theory: Dyson, Eddington, and the Competing Myths of the 1919 Eclipse Expedition” & “Testing relativity from the 1919 eclipse – A question of bias”

NASA Eclipse Database and specific information on the 1919 eclipse

By Matthew Stanley: “An Expedition to Heal the Wounds of War:  The 1919 Eclipse and Eddington as a Quaker Adventurer”

Many of the diagrams (the deflection of light by the Sun, the map of displaced stars, the warped mesh) either came directly or were adapted from figures in Eddington’s Space Time and Gravitation

The path of totality map was based on an image published in the Illustrated London News.

Wikipedia:  Eddington, Dyson, Einstein, 1919 Eclipse, list of NYC ticker tape parades

Posted in TA Episodes

Between Science and HPS: How did I get here?

[NOTE:  I started this blog about three months ago when the first episode of my web series came out on PHDtv, and around that same time I joined Twitter.  I’d also just come back from my first ever non-science conference, the annual meeting of the History of Science Society in San Diego, and I was just beginning to feel comfortable describing myself as a scientist AND a historian of science (I’m still working on that comfort level).  With one foot in either community, I’ve been rather sensitive over the past few months to conflicts, controversies, and misunderstandings between the two disciplines, and there have been a surprising number of them in so short a time.  I’ve been meaning to collect my thoughts on that for a while, and now that I’ve started to do that it seems there are way too many thoughts for one post.  So here’s my first post in a new category that I’ve decided to call “Reflections.”]

I was admitted to Caltech as a graduate student in planetary science in 2007, and sometime since then, in the midst of qualifying exams, conference abstracts and TA assignments, I discovered I had a hidden passion:  history of science.  I don’t know why it took me so long to figure it out.  As an undergrad at MIT, my favorite classes were in the Literature department, and I took enough of them to have majored in it (sometimes I wish I had).  My second home was the student club office of the Shakespeare Ensemble, and I kept participating in student theater after moving to Caltech to pursue my doctorate in planetary science.  I audited language classes (Latin and French) and dropped out when my required coursework in continuum mechanics and geophysics got too intense.

I always knew I loved science, but I didn’t always know that loving it and doing it aren’t necessarily the same thing.  I thought my interest in the humanities and my interest in science were fundamentally incompatible, like oil and water, and I compartmentalized.  I avoided science topics in my extracurricular activities and pretended I didn’t have hobbies (let alone time-intensive ones like theater and learning dead languages) in my science life.
soap
Then one day while I was flipping through the course manual, I found out I could get a graduate minor in History and Philosophy of Science (there is an HPS department at Caltech, although there is no graduate program).  I thought, “Hey, it’s just a minor – I can do that and maybe no one will mind since it’s about science.”  Oil and water won’t mix if that’s all you put in the beaker, but add some soap and it’s a different story.  I figured that history of science might just be my soap, so I registered for classes.

Already pretty good at fitting in extra coursework, I had no problem with “Intro to History of Science.” In fact, I was actually happy to write the first term paper.  Stuck in the world of science journals for three solid years, I actually missed writing compound sentences and finding primary sources and building an argument to a conclusion.  The counterpart class, “Intro to Philosophy of Science” was probably the best class I’ve taken at Caltech, and all in all I felt very happy to be part of a humanities community again.

It was a lot of extra work, but it felt right, and I’m not exaggerating when I say it completely changed the way I look at science, including and especially my own research.  That part was unexpected.  As a practicing scientist at a top-tier school, I went into that first HPS class pretty confident that I knew what science is and how it’s done.  That’s not to say that I had articulated that to myself beforehand – actually, I think the first and biggest lesson I learned was that there are different ways of doing and thinking about science and it’s not something that “everyone just knows.”  That might sound really astoundingly obvious, but I don’t think scientists are encouraged to think about it much in their training – I wasn’t.  There’s a sense that the process is fixed and impartial; you do your work and if it turns out to be right, the scientific method will bear that out and the chaff will fall by the wayside.  We like to think that we ourselves are irrelevant and it’s the evidence and the process that move things forward (hence the hideous passive tense of all those journal articles).  Until I sat down in that classroom with about 18 new Caltech freshmen who signed up to fulfill a Hum requirement, I don’t think anyone had ever asked me “What is science?”

And I found it hard to answer.

That really tripped me up, and I was sold.  I started looking into my options for continuing work in history of science, and even considered switching into it altogether.  I talked to professors I knew about degree programs, job prospects, getting a second Ph.D. – anything I could think of that might help me “make up time,” having spent several years in grad school already.  Then I heard about Daniel Kennefick.  He graduated from Caltech in 1997 with a joint Ph.D. in Physics and History and Philosophy of Science.  He wrote two full theses, had two committees, and (I think) one giant defense.  Afterward, he did a couple of postdocs in history of science, published his history thesis as a book, and went back to physics and is now a full-time professor.  While Caltech has no graduate program in any of the humanities subjects, it seems that it’s small enough to make some new rules if you have the right combination of resolve, talent, and charismatic advisors on your side (Kennefick’s was Kip Thorne).  It’s maybe not quite the same as getting two separate Ph.D.s, but it gives me the option of finishing my science degree (which is very important to me) while also doing some real work and gaining credibility (well, hopefully) in history of science.

graduateSo that’s the plan.  It hasn’t all been unicorns and rainbows, but I believe I can make it work.  It’s not an easy thing to explain to my colleagues in planetary science (or even to my family, who I’m sure are wondering when I’ll graduate already) that a Ph.D. in science isn’t enough.  On the other hand, people I’ve met in history of science fields have been surprisingly welcoming.  I’ve spent a lot of time in the past few weeks trying to sort out exactly this interaction:  how do scientists see historians and philosophers of science, and vice versa?  And how do I fit in now?  I worry a little that I’ll never fully be part of either community, that both sides will doubt me as a “serious researcher,” but that’s a post for another day.  For now I’m happy to just let everyone (including me) get used to the idea that I can define myself in more than one way.

There’s another strand to this story that I’ve been avoiding, and it deserves its own post too.  While I was going about my business taking classes for a graduate minor, the huge freight train of science communication (and commiseration) that is PHD Comics was barreling toward me, and in the fall of 2010 I was swept into The PHD Movie and all of its aftermath, which included the beginnings of PHDtv, my own web series True Anomalies (Tales from the History of Science), and this blog.  Already balancing two academic lives, I suddenly had access to the world of science communication too.  Can all three work together?  Find out next time…

Posted in Reflections

Ep. 2 in Poster Form: Arrr!

Here’s all of Episode 2 (Arrr, Scurvy Knaves!) in one handy giant poster.  Actually, it’s the same exact poster I used to make the video, except for the big, red, dashed line that’s supposed to help you figure out how to read it – the path got a little crazy this time!

Scurvy: Poster Version

Posted in TA Episodes

Episode 2 – Scurvy Knaves!

When’s the last time you worried about getting scurvy? Probably not too recently! That’s because we know that it’s caused by a deficiency of ascorbic acid (vitamin C), which is abundant in fresh foods that are normally readily available.  If you were to stop getting enough vitamin C, you’d be in big trouble because your body would be unable to produce healthy collagen, the biggest component of connective tissue.  Among other unpleasant things, you’d start noticing tiny bruises where capillaries have broken under the skin, your muscles would ache, and you’d start to develop gum disease – it’s pretty horrible, so drink that orange juice!

Scurvy’s not very common in the developed world anymore, so you probably have nothing to worry about, but that hasn’t always been the case.  Take one classic scurvy stereotype:  pirates!  Pirates are often associated with scurvy because they (and lots of other people) went on long sea voyages without frequent access to fresh food.  Overland expeditions, military campaigns, and refugee camps have all suffered enormously from scurvy as well.  The funny thing is, there were times when it seemed like the secret to preventing scurvy had been figured out, and other times when it seems to have been forgotten again!

Why has the history of scurvy had so many ups and downs? For one thing, scurvy preventatives like lime juice weren’t always to be trusted because their vitamin C content could be destroyed by the methods used to preserve them on ships, and the concept of vitamins (substances that we need to ingest to stay healthy) was not accepted until the early 20th century.  Another important factor was the lack of an animal model for scurvy – all researchers had to go on were records of human encounters with the disease, which made experimenting to find its causes and cures nearly impossible.

Thus, when Norwegian researchers Axel Holst and Theodor Frölich chose the guinea pig as their test subject for scurvy, they had unwittingly taken a huge step toward understanding the disease.  At a glance, guinea pigs and humans may not seem very similar, but we share a very specific and very rare attribute: our bodies don’t produce vitamin C, so we have to obtain it from our diet.  Almost every other known animal species makes ascorbic acid for itself and is thus never at risk of getting scurvy.  What a lucky choice!

[All sources for the video and text are listed in the previous post.]

Posted in TA Episodes

Arrr, Ye Scurvy Sources!

It’s taken quite a bit of reading over the past several weeks to put together the second episode of this series, and there’s so much that didn’t make it in!  Here’s a list of sources for the images and information:

On Scurvy and Vitamin C:

 About Holst and Frölich:

On Guinea Pigs:

Notes on Images:

Posted in TA Episodes

Episode 2 is Coming!

It’s been a little quiet here for the past few weeks while I’ve been busily working away on the second episode of True Anomalies (Tales from the History of Science) – I’m excited!  Here’s a sneak peek:

Hipster Guinea PigYup, it’s about scurvy (and guinea pigs).  Stay tuned!

(Also, credit for the meme idea goes to my husband – thanks, Jon!)

Posted in Extra Credit, News

Tribo…what?

Why does a party balloon stick to the wall after you rub it on your head? Static electricity, of course!  But why does it really happen?  It occurred to me while researching electric machines from the 1740s (like Abbé Nollet’s machine featured in Ep. 1) that aside from vague recollections from Physics 101 of glass rods and rabbit fur, I didn’t have any kind of intuitive understanding of static electricity, specifically the contact or frictional variety, which has its own nifty word:  triboelectricity.

The prefix ‘tribo-‘ comes from the Greek word τρίβος, which means ‘rubbing’ (according to the OED), and it was a word I’d never come across before.  I had wanted to include a brief explanation of how it works in the Nollet piece, but it just didn’t fit, so instead it gets a whole post to itself!

Nollet’s machine éléctrique is pretty straightforward. One person turns the large wheel, which causes a glass globe to rotate (very quickly, given the ratio of the wheel diameter to the diameter of the spindle holding the globe) at the other end.  A second person, the woman in this image, holds a wool cloth against the globe as it spins, and a metal bar – suspended on threads to keep it insulated – is placed in contact with the glass (shown below).  The woman and the glass globe are trading electrons as the glass whirls about – she’s gaining them and the globe is losing them.  Why does it happen that way and not the other way around?

The short answer:  the glass and the wool are made up of different kinds of atoms.  (Well, yeah – no one’s surprised by that, right?)  Each kind of atom has a unique number of protons (that’s what makes it a distinct element), and hence a unique number and configuration of electrons (neutral atoms at least).  As a result, it’s a little bit easier for some atoms to accept extra electrons than others, and other atoms are better at giving up an electron or two – a property called charge affinity (although for atoms that are part of a molecule, electronegativity is maybe more appropriate).

ChargeLeydenJar

That’s what’s going on with the wool and the glass. When they come into contact with each other, some points on that interface are so close together that the atoms actually form an adhesive bond, and when that happens they start to exchange charges with each other. When the contact is broken, one side can be left with extra electrons borrowed from the other, and the more times the contact is made and then broken, the more charge can build up.  That’s why the electric machine is so effective – by spinning the globe quickly, you’re able to make and break contact a gazillion times with very little effort!

Once you have all this charge built up on the glass, you can feed it into the Leyden jar by connecting the metal bar (the “prime conductor”) to a wire that hangs down inside the jar.  As long as you’re holding it (and as long as you’re grounded), the built-up charge inside the jar will cause an equal and opposite charge to build up on the outside.  Ta-da!  You now have a loaded Leyden jar, ready to deliver a punch to anyone who completes the circuit.

Leyden_jar_being_discharged

 

Some trivia:

1) Nollet and his contemporaries had a special tool for discharging the jar that allowed them to touch the outside of it to the wire hanging inside.

Leyden-Jar-Battery

 

 

2) You can link many Leyden jars together to pack a bigger punch, and that’s where the modern usage of the word “battery” comes from!  Ben Franklin applied the military term to the set of jars, which reminded him of a collection of guns.

3) The word root ‘electro-‘ comes from the Greek ήλεκτρον, which means ‘amber’ – a material that has been known since antiquity to build up charge if you rub it with a cloth like silk or leather.

Sources: Balloons & Static Electricity;  Electric Machine; Charging a Leyden JarLeyden Jar Being Discharged; Battery of six Leyden jars; see also the sources listed here.

Posted in Extra Credit