Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - contact me Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca on Twitter Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Lumondo Photography Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Pi Art Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Hilbertonians - Creatures on the Hilbert CurveMartin Krzywinski / Canada's Michael Smith Genome Sciences Centre / mkweb.bcgsc.ca - Pi Day 2020 - Piku
Here we are now at the middle of the fourth large part of this talk.Pepe Deluxeget nowheremore quotes

science: exciting



Scientific graphical abstracts — design guidelines


fun + amusement

Eggnauts — Engineers Launch Model Rockets at UBC

Jul 27 2005 | text and photos by Martin Krzywinski | After reading the UBC media release announcing that model rockets would be fired at UBC, I could not resist.

The contest was to launch a rocket at least 150m into the air with a payload of an egg and bottle of maple syrup. You guess it - the egg had to be returned back to earth in relative safety. I was first in line to see the egg carnage, which promised to be the best part of the show. Who wants to see whole eggs landing in relative safety anyway?

The first launch - missed

Not knowing exactly where the launch would be held (the media release said Thundebird Park - which is huge), I was hanging around at the center of the park hoping that smoke and cheers would guide me. Sure enough, at about 5:30 I heard a bang and a puff of smoke.

I found the launch platform - but unfortunately missed the first lift-off.

The second launch - just smokin'

I was well positioned with my camera for the second launch. After a few times being told to step even further back - so that I would not get egg on my face, I'm sure - I settled into a position that was both safe and a good lookout.

Unfortunately, from my vantage point I was shooting right into the sun, so the photos are a little bleached out. I also had the 24-70mm f/2.8L on my 20D so I couldn't get good reach. The photos here are 100% crops.

Shooting at 5 fps, I caught the first sign of the plume developing around the rocket as its engines ignited.

UBC rocket launch

After the second frame, the acceleration was rapid and the rocket lifted off to 2-3 m before my next frame.

UBC rocket launch

And it was on its way!

UBC rocket launch

And then it just kept going, and going and going. It finally disappeared travelling west. Nobody heard from the egg again.

UBC rocket launch UBC rocket launch UBC rocket launch

The third launch - it's ok, the car's just a rental

After the second launch I repositioned myself to face south, with the sun at my back. After the excitement of the egg launched into orbit, I could hardly anticipate what came next. I was in for a show so exciting that all remaining launches were promptly canceled. Read on.

Before the launch, I caught the engineers looking over their rocket. Handling it lovingly, they were making sure that the eggnaut and maple syrup were snuggly nestled into the payload canister.

UBC rocket launch

The tension was palpable. Would it launch? Would it reach 150m? Would the eggnaut return to tell the tale without cracking?

UBC rocket launch

Once again, the shutter flapped at 5 fps as the rocket took off. This time, I caught the start of the plume at just the right time and captured the rocket take off in the first few frames.

UBC rocket launch

The trip started solidly for our eggnaut. The launch was timely, and more importantly, the rocket was travelling vertically - upwards. Would the egg make a career out of it? Just as our hopes were rising, we realized that something was terribly wrong. Shortly after take off, it became clear that the eggnaut was doomed. We didn't want to believe it at first, but it was obvious that the flight plan was taking a turn for the worse.

UBC rocket launch

The rocket began to spin wildly. To add, it began to turn to traveling the directly of the shocked onlookers and the parking lot. It was not longer just about the egg anymore. Fear gripped me, but I kept shooting. The next four frames reveal the horrible events that sealed the eggnaut's doom. In the second of the frames, an unplanned explosion is clearly seen. The rocket is undeterred by this, and continues to fly in the direction of the spectators.

UBC rocket launch

UBC rocket launch

UBC rocket launch

UBC rocket launch

The travel path became more erratic, and only a few seconds later the last booster cut-off. The eggnaut, perhaps still viable, was in free fall. Falling, accelerating - right into the parking lot.

UBC rocket launch

I started running towards the extrapolated crash site, as I heard a thud. When I got there, a small crowd already formed around the impact site. Someone called for an eggdoctor. In my first shot of the macabre, only the parachute, never deployed, is seen. The true extent of the disaster is covered by the figure of solemn child.

UBC rocket launch

Rapidly, the team of engineers arrived on site. Although the rocket spent about 10 fateful seconds in the air, it only traveled about 30 meters, as the crow flies (which it does much longer).

UBC rocket launch

Of course, all eyes were on the contents. Was the eggnaut safe? Perhaps by some earthly miracle, the impact was not severe enough. Of course, even before the rocket payload canister was opened, we all knew that the sickly thud that placed the rocket less than a meter from a car was a mortal hit to our airborne friend.

UBC rocket launch

The next photo captures the human moment of tragedy. The team lead finally realizes that nothing survived. The man behind him and to the right bites his lip in disappointment and shock.

UBC rocket launch

The next photo reveals the payload - now turned into an ogrish paste of eggnaut and maple syrup.

UBC rocket launch

The fourth launch - canceled

The fourth team stood by - their launch canceled. Their hearts were heavy with the tragedy of the previous team's horrible flame-out. One of the team members is seen here so distraught that he kneals and leans on his rocket for support.

UBC rocket launch

Yet they could not help but imagine - how far would their eggnaut have traveled?

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news + thoughts

Music for the Moon: Flunk's 'Down Here / Moon Above'

Sat 29-05-2021

The Sanctuary Project is a Lunar vault of science and art. It includes two fully sequenced human genomes, sequenced and assembled by us at Canada's Michael Smith Genome Sciences Centre.

The first disc includes a song composed by Flunk for the (eventual) trip to the Moon.

But how do you send sound to space? I describe the inspiration, process and art behind the work.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The song 'Down Here / Moon Above' from Flunk's new album History of Everything Ever is our song for space. It appears on the Sanctuary genome discs, which aim to send two fully sequenced human genomes to the Moon. (more)

Browse the genome discs.

Happy 2021 `\pi` Day—
A forest of digits

Sun 14-03-2021

Celebrate `\pi` Day (March 14th) and finally see the digits through the forest.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The 26th tree in the digit forest of `\pi`. Why is there a flower on the ground?. (details)

This year is full of botanical whimsy. A Lindenmayer system forest – deterministic but always changing. Feel free to stop and pick the flowers from the ground.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
The first 46 digits of `\pi` in 8 trees. There are so many more. (details)

And things can get crazy in the forest.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
A forest of the digits of '\pi`, by ecosystem. (details)

Check out art from previous years: 2013 `\pi` Day and 2014 `\pi` Day, 2015 `\pi` Day, 2016 `\pi` Day, 2017 `\pi` Day, 2018 `\pi` Day and 2019 `\pi` Day.

Testing for rare conditions

Sun 30-05-2021

All that glitters is not gold. —W. Shakespeare

The sensitivity and specificity of a test do not necessarily correspond to its error rate. This becomes critically important when testing for a rare condition — a test with 99% sensitivity and specificity has an even chance of being wrong when the condition prevalence is 1%.

We discuss the positive predictive value (PPV) and how practices such as screen can increase it.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Nature Methods Points of Significance column: Testing for rare conditions. (read)

Altman, N. & Krzywinski, M. (2021) Points of significance: Testing for rare conditions. Nature Methods 18:224–225.

Standardization fallacy

Tue 09-02-2021

We demand rigidly defined areas of doubt and uncertainty! —D. Adams

A popular notion about experiments is that it's good to keep variability in subjects low to limit the influence of confounding factors. This is called standardization.

Unfortunately, although standardization increases power, it can induce unrealistically low variability and lead to results that do not generalize to the population of interest. And, in fact, may be irreproducible.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Nature Methods Points of Significance column: Standardization fallacy. (read)

Not paying attention to these details and thinking (or hoping) that standardization is always good is the "standardization fallacy". In this column, we look at how standardization can be balanced with heterogenization to avoid this thorny issue.

Voelkl, B., Würbel, H., Krzywinski, M. & Altman, N. (2021) Points of significance: Standardization fallacy. Nature Methods 18:5–6.

Graphical Abstract Design Guidelines

Fri 13-11-2020

Clear, concise, legible and compelling.

Making a scientific graphical abstract? Refer to my practical design guidelines and redesign examples to improve organization, design and clarity of your graphical abstracts.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
Graphical Abstract Design Guidelines — Clear, concise, legible and compelling.

"This data might give you a migrane"

Tue 06-10-2020

An in-depth look at my process of reacting to a bad figure — how I design a poster and tell data stories.

Martin Krzywinski @MKrzywinski mkweb.bcgsc.ca
A poster of high BMI and obesity prevalence for 185 countries.


me as a keyword list

aikido | analogies | animals | astronomy | comfortable silence | cosmology | dorothy parker | drumming | espresso | fundamental forces | good kerning | graphic design | humanism | humour | jean michel jarre | kayaking | latin | little fluffy clouds | lord of the rings | mathematics | negative space | nuance | perceptual color palettes | philosophy of science | photography | physical constants | physics | poetry | pon farr | reason | rhythm | richard feynman | science | secularism | swing | symmetry and its breaking | technology | things that make me go hmmm | typography | unix | victoria arduino | wine | words