If you’re active on #sciencetwitter, you may have seen a thread recently about tautonyms. “Tautonym” is a cool word for scientific names where the genus and species are the same word, For example, Vulpes vulpes is the scientific name for the red fox.
I have taken great delight in sharing these tautonyms with friends, colleagues, and random strangers on the bus. However, the problem that I keep having is that people want more details about something than the name. If you’ve had that problem, too, then this blog is for you. Continue reading “Extra extra: Read All About Tautonyms”
The science world is a-twitter with excitement lately, following the recent arrival of the New Horizons spacecraft at 2014 MU69, dubbed “Ultima Thule” by popular vote. The name means “beyond the borders of the known world”, signifying Ultima Thule’s status as the most distant object ever visited by Earthly spacecraft. Ultima Thule is a dark reddish rock in the Kuiper belt, a contact binary formed by two smaller rocks coming together in what was presumably a gentle fashion.
Reaching this space snowman 6.5 billion kilometers away from Earth took brains, dedication, ingenuity and the help of an unnamed Argentinian man and his daughter.
To successfully intercept Ultima Thule, the New Horizons mission team needed to answer some questions, such as “What trajectory is Ultima Thule on?” and “Is there any space debris around Ultima Thule that will destroy our spacecraft?” Being so small (~30km diameter at its widest point), observing Ultima Thule directly from this far away would be too difficult, so the team relied on data gathered during stellar occultations, i.e., when Ultima Thule passed in front of a star.
One of these occultations occurred on July 17, 2017, in the Patagonia region of Argentina. The team had already struck out twice in trying to observe Ultima Thule passing over a star: once in South Africa, and again using the airborne telescope SOFIA over the Pacific Ocean, so tension was already running high.
On this particular night, it happened to be very windy where the observation team was, which is bad news when you’re trying to hold steady focus on a tiny object that’s really far away. The team found themselves needing help to shield the telescopes they had brought with them from wind vibrations, and get the data from the star “without it jiggling around all over the place”, as planetary scientist Anne Verbiscer puts it.
Where does one find volunteers for an astronomical observation? Well, apparently even in Argentina NASA is known and loved, and help can be found just by walking into the community. “If you just started out with ‘We’re from NASA,’ people started coming out of the woodwork,” said Dr. Verbiscer. And that is how one Argentinian man and his daughter ended up spending their evening blocking the wind from a telescope using a truck, a tarp and some plywood, allowing the NASA folks to collect the data they needed to send New Horizons to Ultima Thule.
Want to learn more about the search for Ultima Thule? Check out the episode of NOVA that inspired this blog!
We have published 130 blogs here at Promega this year (not including this one). I diligently reviewed every single one and compiled a list of the best 8.5%, then asked my coworkers to vote on the top 5 out of that subset. Here are their picks:
This past weekend, I had the opportunity to be a part of “Once Upon a Christmas Cheery in the Lab of Shakhashiri”. Bassam Z. Shakhashiri is a professor of chemistry at the University of Wisconsin–Madison who is well-known for his fun science demonstrations and a fervent dedication to public science communication. Once Upon a Christmas Cheery started in 1970 as an end-of-semester treat for Dr. Shakhashiri’s freshman chemistry class; by 1973, the Christmas lecture had become so popular that Wisconsin Public Television offered to broadcast it during Christmas week, and this collaboration has continued uninterrupted ever since.
That’s 49 years of Christmas lectures, commemorated by making indium, the 49th element, the Sesame Street-esque “sponsor” of the show. It helps that indium burns bright violet, the name of Dr. Shakhashiri’s granddaughter and hence his favorite color. The color purple made a firm foundation for many aspects of the show: The chrysanthemums frozen in liquid nitrogen were purple, as was the balloon I inflated during my spiel on air movement. Most of the set was various shades of purple, too.
In my second or third year as a graduate student, I had to ship some microfluidic masters to a collaborator in Kenya. The masters were extremely fragile and took me several days in a cleanroom gown to make. I was horrified at having to send them on a perilous journey overseas, and somewhat flabbergasted that they made it to Nairobi whole and well. And yet, every day thousands of delicate items zoom around the world and arrive at their destinations in one piece. How?
Dennis Dimick has focused his journalism career on the collision between human aspiration and the planet. The son of fisheries biologists, Dimick grew up on a farm in Oregon’s Willamette Valley, and he holds degrees in agriculture and agricultural journalism from Oregon State University and the University of Wisconsin-Madison. In his 35 years at National Geographic, he served for over a decade as the magazine’s environment editor, and guided major projects on climate change, energy, freshwater, population, and food security. Dimick is co-founder of Eyes on Earth, a project meant to inspire a new generation of environmental photographers.
As a young man, Dimick witnessed firsthand the price of progress when his family’s farm was cut in half by the construction of an interstate beltway. This invasion of their farm, in addition to the clear-cut logging of nearby forests where Dimick had spent his youth, combined to sensitize him to the profound impacts of human progress on the Earth. Early photography experience and his personal connection to the effects of human progress led to a life and career spent combining these two dimensions.
In anticipation of hisparticipation in the 2018 Wisconsin Science Festival, I asked Mr. Dimick some questions about photojournalism, and what it’s like documenting the human impact on the environment. Some of his answers have been slightly edited for clarity.
Have you ever thought about plant viruses? Unless you’re a farmer or avid gardener, probably not. And yet, for many people the battle against agricultural viruses never ends. Plant viruses cause billions of dollars in damage every year and leave millions of people food insecure (1–2), making viruses a major barrier to meeting the United Nations’ global sustainable development goal of Zero Hunger by 2030.
At the University of Western Australia, Senior Research Fellow Dr. Laura Boykin is using genomics and supercomputing to tackle the problem of viral plant diseases. In a recent study, Dr. Boykin and her colleagues used genome sequencing to inform disease management in cassava crops. For this work, they used the MinION, a miniature, portable sequencer made by Oxford Nanopore Technologies, to fully sequence the genomes of viruses infecting cassava plants.
Cassava (Manihot esculenta) is one of the 5 most important calorie sources worldwide (3). Over 800 million people rely on cassava for food and/or income (4). Cassava is susceptible to a group of viruses called begomoviruses, which are transmitted by whiteflies. Resistant cassava varieties are available. However, these resistant plants are usually only protected against a small number of begomoviruses, so proper deployment of these plants means farmers must know both whether their plants are infected and, if so, the strain of virus that’s causing the infection. Continue reading “Moving Towards Zero Hunger, One Genome at a Time”
In general, people like to know that their food is what the label says it is. It’s a real bummer to find out that beef lasagna you just ate was actually horsemeat. Plus, there are many religious, ethical and medical reasons to be cognizant of what you eat. Someone who’s gluten intolerant and Halal probably doesn’t want a bite of that BLT.
Labels don’t always accurately reflect what is in food. So how do we confirm that we are in fact buying crab, and not whitefish with a side of Vibrio contamination?
For the most part, it comes down to separation science. Scientists and technicians use various chromatographic methods, such as gas chromatography, liquid chromatography, and mass spectrometry, to separate the complex mixture of molecules in food into individual components. By first mapping out the molecular profile of reference samples, they can then take an unknown sample and compare its profile to what it should look like. If the two don’t match up, an analyst would assume that the unknown is not what it claims to be. Continue reading “Of Mice and Microbes: The Science Behind Food Analysis”