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Jacob Tennessen

@jacobphd.bsky.social
443 followers 329 following 738 posts

Scientist errant. Genetics, evolution, whimsy, awe. connects.catalyst.harvard.edu/Profi… 🧬🦟🐌🩸👤🦠🍓🐸🧬

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Jacob Tennessen @jacobphd.bsky.social · 11h
Black-tailed deer, Leavenworth, WA. Looks like the jungle but this is in someone’s lawn on a residential street.
I already described this in the main text
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Jacob Tennessen @jacobphd.bsky.social · 01/10/2026
The image was taken without attribution from this sculpture by artist Jack of the Dust (jackofthedust.com), who is probably unaware that his work is being used by far-right politicians. In case you want to buy me a present or need any Halloween ideas, check it out.
Snail sculpture
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Jacob Tennessen @jacobphd.bsky.social · 01/10/2026
It’s political ad season, which apparently means depicting your opponent as a Death Snail because she doesn’t believe in unfettered economic growth. As a professional death snail scientist, let me say that this unironically makes her look cool and hardcore.
Snail with a human skull for a shell on a political ad
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Jacob Tennessen @jacobphd.bsky.social · 29/09/2026
On both the left and right, there is a significant association between genotype (GG / AG / AA) and phenotype (red vs blue). But to odds ratio per allele on the right is more than double that on the left (5.2 vs 2.1), even though visually they don't look all that different.
Hypothetical distribution of genotypes and phenotypes
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Jacob Tennessen @jacobphd.bsky.social · 29/09/2026
It's the Eocene. You're told that in 45 million years all of these lineages will remain but only one figures out DNA sequencing. On whom do you place your bet? And what are realistic odds for each one if you could run the experiment 1000 times?
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Jacob Tennessen @jacobphd.bsky.social · 23/09/2026
Nothing obvious on their homepage to indicate that it’s *not* about evolutionary biology
Screenshot of Adaptation journal homepage
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Jacob Tennessen @jacobphd.bsky.social · 14/09/2026
Countries that share the last four letters of their name (in English)
World map showing which countries share the last four letters
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Jacob Tennessen @jacobphd.bsky.social · 03/09/2026
Given that arbitrary and convoluted naming rationale, I don’t call it that. I usually say Loowit or Lawetlat’la, regional indigenous names. Especially important as Native place names in the US are getting replaced for the pettiest of reasons.
Floor mural at Ilani, the casino on the Cowlitz Reservation, highlighting Lawetlat’la
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Jacob Tennessen @jacobphd.bsky.social · 03/09/2026
Top of Mt St Helens. Named by George Vancouver for the new title his friend (who never visited here) had earned just before he left: Baron St Helens after a village on the Isle of Wight, named for an abandoned church there named for the sainted mother of a roman emperor famous for transporting cats.
Me, in foggy and rainy weather near the crater rim of Mt. St. Helens / Lawetlat'la / Loowit.
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Jacob Tennessen @jacobphd.bsky.social · 02/09/2026
What should we call this protein that affects your fatty acid metabolism? Oh I know
Uniprot entry for THIC_HUMAN
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Jacob Tennessen @jacobphd.bsky.social · 01/09/2026
This week's bittersweet accomplishment: getting a grant proposal approved by a federal agency with no money to actually fund it.
Statement from CDC about our recent proposal, which was approved but cannot be funded at this time.
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Jacob Tennessen @jacobphd.bsky.social · 31/08/2026
Just realized I've peer-reviewed for 75 journals in my career thus far. Feels like a milestone.
Word cloud of journal for which I have been a peer reviewer.
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Jacob Tennessen @jacobphd.bsky.social · 31/08/2026
New paper! We looked at how clinical metrics are correlated with disease severity in a cohort of malaria patients in Goa, India. More parasites = worse disease, but it's not as simple as counting cells in a blood sample since the sneaky parasites hide in other tissues. www.ajtmh.org/view/journal...
Figure showing how parasitemia (count of malaria parasites in blood) is correlated with malaria disease severity.
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Jacob Tennessen @jacobphd.bsky.social · 26/08/2026
Among other feats, St. Thecla allegedly escaped being devoured by beasts (a punishment for resisting rape), including a pool of killer seals which were miraculously all struck by lightning. May we all escape deadly mosquito bites as well, and learn the classics so we don't misname genomes.
St Thecla being tasted by various animals
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Jacob Tennessen @jacobphd.bsky.social · 26/08/2026
If you get malaria in Central/Caribbean America, it was likely from Anopheles albimanus. The main research colony STECLA is often misspelled in the scientific literature; annoyingly even the official species reference genome is named wrong. It's for Santa Tecla, El Salvador, in turn for St. Thecla.
Anopheles albimanus reference genomes on NCBI
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Jacob Tennessen @jacobphd.bsky.social · 23/08/2026
How ancient diseases were named Italians: This one’s probably caused by the influence of the planets, so we’ll call it influenza. And I bet that one’s from bad air, so it shall be known as malaria Egyptians: I went to pee and blood came out! ĀĀĀ!
Text on schistosomiasis in ancient Egypt
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Jacob Tennessen @jacobphd.bsky.social · 20/08/2026
A couple of books I’ve read recently that made me believe, not in God, but in humanity and our path forward
The Ministry for the Future by Kim Stanley RobinsonA God that Could be Real by Nancy Abrams
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Jacob Tennessen @jacobphd.bsky.social · 15/08/2026
Visited here recently. Turns out the real apes were the friends we made along the way. #cladistics
Sign for Ape Cave National Volcanic Monument. Not my pic.
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Jacob Tennessen @jacobphd.bsky.social · 09/08/2026
Made some buttons with kids this morning
Button with a mushroom that says Fun Guy
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Jacob Tennessen @jacobphd.bsky.social · 06/08/2026
The team of element men remains pretty meager and I think there’s room to add more.
Goldman Sachs CEOTin manIron ManSarah Silverman
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Jacob Tennessen @jacobphd.bsky.social · 29/07/2026
iNaturalist just updated the genus Bison to merge with Bos, as in cattle, reflecting recent genetic analysis and the fact they can readily interbreed. In fact all living American bison are directly descended in part from domestic cattle; the original wild bison is gone, and only Bos hybrids remain.
Bos bison, with sprinkling of Bos taurus, in Yellowstone
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Jacob Tennessen @jacobphd.bsky.social · 23/07/2026
Background info for the audience prior to a production of Taming of the Shrew
A slide at Oregon Shakespeare Festival that asks, What’s a shrew?
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Jacob Tennessen @jacobphd.bsky.social · 18/07/2026
Two of the most iconic Pacific Northwest species are the Pacific chorus frog (Pseudacris regilla) and the Douglas fir (Pseudotsuga menziesii). Both are “false” (pseudo-). It’s the land of real organisms with fake names.
Pacific chorus frogDouglas firs
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Jacob Tennessen @jacobphd.bsky.social · 12/07/2026
Yellowstone used to hand these out
Flyer warning about bison
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Jacob Tennessen @jacobphd.bsky.social · 10/07/2026
Got my beach reading
Hidden Creatures by Dino Martins at a seaside setting
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Jacob Tennessen @jacobphd.bsky.social · 10/07/2026
Two separate congressional candidates in my district, one Democrat and one Republican, have hit upon an issue to unify Americans on both sides of the aisle: Aliens. I say we need to rule out whether any organism currently on Earth is an alien, so fund basic biology research and we'll go from there.
Candidate statement about aliensCandidate statement about aliens
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Jacob Tennessen @jacobphd.bsky.social · 06/07/2026
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Jacob Tennessen @jacobphd.bsky.social · 03/07/2026
Throwback to the time I met Gene Cernan after writing an article about him
Photo of Gene Cernan and myself in 1994, plus a newspaper column by me about Cernan’s astronaut career and Cernan’s autograph
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Jacob Tennessen @jacobphd.bsky.social · 24/06/2026
Coincident with the life of Dolly the sheep (1996-2003), cloning was a hot topic infused in the culture. And then abruptly we all decided it’s not actually that worrisome or interesting. Now it’s hard to even explain the earlier obsession to those who didn’t live through it.
Attack of the Clones posterAustin Powers poster (the one with Mini-Me)The 6th Day posterMultiplicity poster
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Jacob Tennessen @jacobphd.bsky.social · 09/06/2026
Important science happening at the Gordon Research Conference
Me petting a dog while attending a talkMe observing the shell of a horseshoe crab
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Jacob Tennessen @jacobphd.bsky.social · 07/06/2026
Today I head to scenic Newport RI, for the Gordon Research Conference on Biology of Host-Parasite Interactions. Basically this image but about parasites.
SMBC comic where a scientist describes their field like an excited six year old
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Jacob Tennessen @jacobphd.bsky.social · 18/05/2026
In an early scene in this book, a character's minor heroic act hinges on him knowing that snakes can't blink. It's established that biological knowledge like this is an important, positive trait. Later on, some wolf eels are said to blink which in reality they can't do. What am I to make of this?
Remarkably Bright Creatures by Shelby Van Pelt
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Jacob Tennessen @jacobphd.bsky.social · 22/04/2026
Enjoying a celebration of malaria research at OHSU today
Announcement of World Malaria Day at Oregon Health & Science University Live Anopheles stephensi mosquitoes
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Jacob Tennessen @jacobphd.bsky.social · 22/04/2026
Pie-zogony #Plasmodium #WorldMalariaDay
A red-dyed pumpkin pie with cream and cranberries depicting schizogony, in which malaria parasites divide within a red blood cell.
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Jacob Tennessen @jacobphd.bsky.social · 20/04/2026
New paper! How do malaria-transmitting mosquitoes adapt to distinct urban, rural, and forest habitats within a tiny African country? Whole genome sequencing and pop gen reveals their secrets. 🦟🇬🇦🦟 onlinelibrary.wiley.com/doi/abs/10.1...
Fig 1A from Daron et al 2026 showing ecologically divergent collection sites in Gabon
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Jacob Tennessen @jacobphd.bsky.social · 16/04/2026
New beer for vector biologists just dropped
Cans of vicious mosquito IPA
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Jacob Tennessen @jacobphd.bsky.social · 15/04/2026
This illusion is basically how music works. Why do three major thirds make an octave? It feels like a perfect fit, an elegant natural resonance, but it's really a trick made by bending things so slightly our brains don't notice. The top hypotenuse isn't straight, and the notes don't really add up.
Missing square illusion such that four irregular shapes are arranged into two triangles of seemingly identical size and shape, except one has a section missing.
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Jacob Tennessen @jacobphd.bsky.social · 14/04/2026
Nick Wade name-dropped me in the NY Times. Two years later he wrote a book claiming racism is scientifically justified. Our work comparing white and Black exomes did not at all support this, but his sinister interest in it was now clear. His book helped launch the alt-right movement and here we are.
NY headline: Many Rare Mutations May Underpin Disease
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Jacob Tennessen @jacobphd.bsky.social · 14/04/2026
I really appreciate the science journalism surrounding our recent South American mosquito paper. I've had several positive interactions with journalists following up and double-checking things to ensure the facts are correct. Contrast that to my 2012 human exome paper (brief thread)...
Science article: Evolution and Functional Impact of Rare Coding Variation from Deep Sequencing of Human Exomes
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Jacob Tennessen @jacobphd.bsky.social · 10/04/2026
Redwoods! My head for scale.
A man peering through a gap in a large tree
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Jacob Tennessen @jacobphd.bsky.social · 08/04/2026
Thinking of getting one of these for the front lawn
A metal monument to “Genetics” at the Clark R. Bavin National Fish and Wildlife Forensic Laboratory
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Jacob Tennessen @jacobphd.bsky.social · 07/04/2026
Full frontal Swampy
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Jacob Tennessen @jacobphd.bsky.social · 07/04/2026
Awesome speculative biology art at Southern Oregon University
Life-size sculpture of Swampy, a horse-like molluscivore
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Jacob Tennessen @jacobphd.bsky.social · 27/03/2026
Prepping for tomorrow
Poster with a snake on a progress pride flag that says: don’t tread on anyone
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Jacob Tennessen @jacobphd.bsky.social · 26/03/2026
I am truly grateful for the opportunity to explore this dataset and work with so many fantastic collaborators across three continents. Thanks also to the mosquito which never asked to be a malaria vector and only is one because of colonialism.
Anopheles darlingi. Credit: Romuald Carinci and Pascal Gaborit, Institut Pasteur de la Guyane, Cayenne, French Guiana
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Jacob Tennessen @jacobphd.bsky.social · 24/03/2026
If you'll be in Vancouver WA this weekend, come come celebrate the science and humanity of gender at uucvan.org.
Upcoming Service
The Science and Humanity of Gender
March 29, 2026 - 9:15 and 11 am
Cantabile, Deborah Willoughby, Jacob Jacobson Tennessen

Biology teaches us that males and females form part of a continuous spectrum rather than a rigid binary. Come celebrate the diversity of nature, including human nature, that transcends simple classification.
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Jacob Tennessen @jacobphd.bsky.social · 23/03/2026
Calvin and Hobbes comic speculating about the function of tails
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Jacob Tennessen @jacobphd.bsky.social · 23/03/2026
Really excellent paper on the genetics of caterpillar butt ornaments journals.plos.org/plosbiology/...
Figure showing the evolutionary diversification of Lepidopteran larval appendages.
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Jacob Tennessen @jacobphd.bsky.social · 16/03/2026
The Age of Dinosaurs and the Age of Mammals can be combined into the Age of Fluffy Babies, the secret to the success of large dominant vertebrates for 200 million years.
Baby T-rex R. Peterson / © AMNHKitten, image from wikipedia NOESCATSLavender Orpington chick, picture from Wikipedia TomukatsusuPteranodon family, Image credit: James Robins / UCC
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Jacob Tennessen @jacobphd.bsky.social · 13/03/2026
Pondering...
Tumblr thread about vegan vampires who have abandoned blood for coconut waterAbstract from Mori et al. 2008 (https://www.nature.com/articles/hdy200832) on autogeny (not requiring a blood meal) in mosquitoes
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