First day back in the classroom, teaching genetics, and I speculate for a bit about why so many people find the subject difficult. I’ve had smart students who struggled with the concepts. I think the answer is that many people don’t get the whole idea of chance and probability and the statistical nature of inheritance.
The autofocus on my camera was a bit goofy. Someday I’ll get this all figured out.
Another little change in national health policy has occurred.
States will no longer be required to report how many children they vaccinate to the Centers for Medicare and Medicaid Services (CMS), according to a December 30 letter to state health officials.
Maybe if we pretend that infectious disease no longer exists, it will stop happening. Crawl under your bed, close your eyes, and the horrible monster will disappear.
This is just the first phase, though. Over a year ago, Florida was pioneering the way forward.
As Florida moves to become the first in the United States to drop all childhood vaccine requirements, critics have warned of the plan’s potentially deadly public health consequences.
The move would scrap all required vaccine mandates for children, including those required for school attendance, such as polio, diphtheria, rubeola, rubella, pertussis, mumps and tetanus.
The state’s Surgeon General Joseph Ladapo, a longtime vaccine skeptic, on Wednesday compared school vaccine mandates to slavery, calling them “immoral” intrusions on parents’ rights.
“Who am I to tell you what your child should put in their body? I don’t have that right. Your body is a gift from God,” he said.
Children won’t be dying, if we stop reporting on it. Brilliant.
On a related note, I just saw this comment from Gwen Pearson that fits perfectly.
If you have ever dealt with lice, you know that they’re terribly difficult to get rid of, especially if one of the kids’ playmates is constantly recontaminating your family with the problem — if it’s happening at school, everyone in the classroom must take steps to eradicate the nits and lice. It’s the same story with measles, or whooping cough, or polio. Awareness is key, and our government wants to blind us.
So I decided to talk about it.
Sorry, no transcript here…I was just winging it.
I’m a terrible YouTuber — uncharismatic, dull, lacking in visual skills, and incapable of maintaining a consistent schedule — but heck, I’ll try again. Tomorrow (Saturday, 20 December), I’ll go live around 3pm Central time. I’m open to talking about just about anything, but will center the discussion on this paper:
Christopher J. Kay, Anja Spang, Gergely J. Szöllősi, Davide Pisani, Tom A. Williams & Philip C. J. Donoghue (2025) Dated gene duplications elucidate the evolutionary assembly of eukaryotes. Nature, 3 December 2025, DOI: 10.1038/s41586-025-09808-z.
If you don’t want to read an 11 page technical paper, just contemplate this figure:
Or you can just tune in and maybe I’ll explain it.
I think I’m trapped at home today — I tried walking to work, and didn’t get beyond my driveway, because we had a thaw and a refreeze and it’s slick as snot out there. Then we’re supposed to get more snow this morning, with temperatures plummeting down to -15°C with 50mph wind gusts, so I’m cowering at home today. The spiders will go hungry for a day (they are opportunistic feeders, they can handle it).
If you’re similarly stuck at home, here’s an hour long video that I thought was very good. It rips into a couple of self-styled “science” based influencers who are anything but.
The most shocking bit was seeing Joe Rogan getting furious at any push-back on his anti-vax views, and basically shutting down the conversation by claiming that the polio epidemic was co-incident with they years of heaviest DDT use. He also made the standard skeptical claim that vaccines were a late response to an already fading plague, which is sort of true. There are multiple approaches to a serious disease: behavioral shifts, like self-quarantine, and improved hygiene can reduce the incidence and severity of infections, but it takes efficacious medical responses to deliver the coup de grace. And Joe Rogan doesn’t understand science at all if he falls for the correlation equals causation canard. DDT does not cause polio.
The video also jumps on Bill Maher. He’s got this canned response to any claims, saying that we don’t know 100% of everything, more like 20% or 10%, so his weird fads might be true. It’s nonsense. Of course there is much left to learn, but we can say with 100% confidence that you shouldn’t eat cyanide, or that the earth is spherical, or that vaccines don’t cause autism, because smart, skeptical people have studied that stuff and have objective data to back up their arguments. We don’t even quantify knowledge as a percentage fraction of everything, so that’s a bogus metric anyway. I’m willing to go along with a claim that we only know 0.00001% of everything, but that the bits we know, we know pretty damn well, so please, Bill Maher, don’t jump off the roof of a New York skyscraper to test your ‘theory’ of gravity.
Another good topic was about what having a PhD means. It’s not a free pass to make everything you say valuable, important, and true. It just says you passed an apprenticeship. You presumably got some training in critical thinking which the Joe Rogans of the world lack, but you have to demonstrate your skills throughout your life. There are also some really bad theses out there — there is some pressure to get students out the door so you can get a new crop started, and some bad PIs who will let garbage pass as long as they get a publication out of it.
(By the way, I think my PhD thesis holds up. Not only did multiple researchers build on it afterwards, but it wasn’t even just mine — it was the product of a collaboration with several absolutely brilliant mentors and colleagues, which is how every thesis ought to be.)
We just struggled to figure out how to put fitted sheets on a split-top bed, so I’m too tired to do it. Here are a few videos to do the job.
This first one is looking at spiders from an evolutionary perspective — it’s at a basic level, since the first thing it has to explain is that spiders aren’t insects.
This second one is more about spider cognition. It has a similar problem, since what it says isn’t really new. I took a grad-level physiology course from Michael Land in 1980 that focused almost entirely on jumping spiders, and we talked about similar things.
That course was the highlight of my first year of grad school. I guess it’s not surprising that I returned to spiders here in my dotage.
I do post on Patreon. The latest can be read at no charge, and includes a video of a ravenous black widow. The Patreon revenue is what is keeping them in juicy, delicious worms!
I am so confused…but then science is often confusing. I was reading this article in Science magazine that went against my impressions and biases.
For years, scientists have been warning of a precipitous drop in insect numbers worldwide, driven largely by deforestation, pesticide use, and other human activities. But the first study to survey insect populations on a continental scale—based on radar data typically used to study weather patterns—finds no evidence of widespread decline, at least over a recent 10-year period. Instead, the research—published this week in Global Change Biology—suggests bug numbers tend to be sensitive to the severity of winter weather, with warmer winters posing a problem.
What, no decline? But I’ve seen a dramatic decline here in western Minnesota! Could I be wrong? Maybe. My perspective is narrow and local, and I’ve been looking at a small number of species, just spiders, that I’ve assumed would be a good proxy for overall insect number. I could be totally off, misled by a local variation that fit what I expected to see.
So I read the source paper. First surprise: the title doesn’t say there is no evidence of decline, but rather “Systematic Continental Scale Monitoring by Weather Surveillance Radar Shows Fewer Insects Above Warming Landscapes in the United States“. So there is evidence of decline in areas that show signs of warming. The abstract complicates matters further.
Anthropogenic change is predicted to result in widespread declines in insect abundance, but assessing long-term trends is challenging due to the scarcity of systematically collected time series measurements across large spatial scales. We develop a novel continental-scale dataset using a nationwide network of radars in the United States to generate a 10-year time series of daily aerial insect density and assess temporal trends. We do not find evidence of a continental-scale net decline in insect density over the 10-year period included in this study; instead we find a mosaic of increasing and declining trends at the landscape scale. This spatial variation in density trends is associated with climatic drivers, where areas with warmer winters experience greater declines in insect density and areas with cooling winter trends see increases in density. Winter warming has a stronger negative effect on density at higher latitudes. After assessing temporal trends, we also use the 10-year dataset and atmospheric variables to model insect aerial abundance, finding that on a typical summer day approximately a hundred trillion (1014) flying insects are present in the airspace, representing millions of tons of aerial biomass. Our results provide the first continental-scale quantification of insect density and its response to anthropogenic warming and demonstrate the utility of weather surveillance radar to provide large-scale monitoring of insect abundance.
Right away, I have reservations. If my observations are insufficient because I’m looking at too few species in one locale, this study is using one technique with low resolution on a continent wide scale and one could argue that it could be equally insufficient and misleading. It is data, though, and should be part of any analysis of the problem. Let’s not pretend that their sampling method doesn’t incorporate its own systematic biases. It’s only going to detect flying insects that exhibit swarming behavior, and they’re only looking at daytime numbers. It’s a correlational study that associates declines with only temperatures, but I’d suggest that those other factors (deforestation, pesticide use, and other human activities) are so ubiquitous and difficult to measure discretely that they’d disappear in the analysis.
Also, their own data does show evidence of a decline…in latitudes above 40°.
Temporal pattern of change in insect density as a function of change in winter temperature. (a) 10-year trend in day-flying insect density as a function of the change in local mean winter temperature, colored by site latitude. (b) Temporal trend as a function of winter temperature at latitudes ≤ 40°. (c) Temporal trend as a function of winter temperature at latitudes > 40°. Fitted lines are derived from a least-squares linear regression on percentage change in insect density. Linear model with change in mean winter temperature, interaction with latitude, and longitude explains 18% of variation in insect declines.
They also see some interesting variations, like the effect of land development on the sensitivity of populations to change.
Temporal pattern of change in insect density as a function of developed land cover. (a) 10-year trend in day-flying insect density as a function of the fraction developed land cover in the landscape, colored by the change in mean winter temperature. Line is given by LM. (b) Change in mean winter temperature as a function of the fraction developed land cover. Line is given by LM, correlation coefficient = 0.37 p < 0.0001. (c) Change in mean winter temperature as a function of the fraction grassland in the landscape. Line is given by LM, correlation coefficient = −0.54, p < 0.0001.
Insect populations are actually increasing over developed areas? I’d like to know the baselines on that — this is a study over a short timescale of ten years, and who knows, minor fluctuations over areas where the population has already been decimated by development might appear as a larger percentage change. I also wonder if we might be seeing the effect of adaptation or invasive species on those areas.
I’d also be concerned that native grasslands are hurting.
They do argue that anthropogenic stressors are having a serious effect.
Although we do not observe continental scale declines, the spatial patterns of abundance trends identified in this study can pinpoint potential stressors or drivers of insect declines. Declines in aerial insect density were stronger in regions that experienced increasing winter temperatures. During overwintering, warming can decrease fitness by releasing organisms from cold-induced dormancy, thereby increasing metabolic rates, and depleting energy reserves. Winter warming may also result in increased mortality due to phenological mismatches with resources, and may extend the activity period for natural enemies and reduce pathogen die-off during the winter season. Negative effects of winter warming on insect abundance in temperate regions have been shown in local surveys of beetles, butterflies, and arthropods generally, indicating that winter is a particularly sensitive season for temperate ectotherms.
Sensitivity to winter warming varies across populations and is likely more common in cooler climates where thermal seasonality is strong. Our results show a negative effect of winter warming at high latitudes, with no effect at latitudes below 40°. This latitudinal interaction between winter warming and aerial insect density aligns with theory suggesting that climate warming will have the strongest effect on cool-adapted arthropods. For example, metabolic costs are greater at high latitudes, affecting organisms’ cold tolerance and resulting in greater risks of energy depletion if winters become warmer under global change. Experimental warming has shown that high elevation gall wasp species experience greater decreases in survival and fecundity than those from lower latitudes. These stronger responses from high latitude insects to winter warming are particularly concerning because the magnitude of warming under climate change also increases with latitude.
I definitely live in an area with harsh winters, which would explain how I have a strong impression of declines on the basis of local observations. I don’t understand, though, how the work in this paper can be used to minimize the changes in insect populations. I’m also a little concerned that it’s being used to endorse a hands-off analysis of relatively coarse radar data over expecting entomologists to get their hands dirty and get up close with the organisms.
Seriously, I’d love to visit the high Arctic. Utqiaġvik (formerly called Barrow) is the northernmost point of the United States, dangling on a small peninsula on the northern edge of Alaska. The sunset the other day was the last they’ll see for a few months, so it’s cold, remote, and dark, the kind of place I wouldn’t mind living in. The population size is about the same as the place I live in now.
I’m never going to get to visit it, though, so I’ll have to settle for the Utqiaġvik Sea Ice Webcam. You too can visit that website and observe the slow progression of darkness and ice in the Arctic. Well, maybe — right now it’s continuously dark.
You can also check out the sea ice radar and see what the ice is doing. It’s a little more lively than the town.
…one should spend some time with one’s spiders. I know it is numerically the 10th month, but it should be the 8th month by name, if not for some silly Romans who tried to squeeze a couple more emperors into the calendar. It was feeding day anyway, so I spent a little time giving them treats in celebration.
Here’s Blue, who gobbled down her mealworm instantly, and is now dabbling her toes in her water dish.
It’s getting more difficult to photograph Blue, because she’s covering everything with silk — when you look in from the side, it’s a haze of strands everywhere, and I have to remove the lid to the terrarium to lean in and see what she’s up to.
I fed the Steatoda borealis, the Parasteatoda tepidariorum, and the Latrodectus mactans juveniles as well. I’ve isolated about 80 black widow juveniles in individual vials, and am running out of room in the incubator, so there’s about 80-100 more left in a container together, like a giant colony of black widows. It’s a Darwinian world in there — I figure I’ll let the numbers decline and then extract the biggest survivors.
One thing I’ve noticed is that the isolated individuals, in spite of getting a bounty of fruit flies twice a week, are growing more slowly than some of the black widows in the communal container. Most are small, but there’s a few that stand out as growing distinctly larger than their siblings.
(Photos were taken immediately after I dumped a lot of fruit flies into the container, so they’ve all got their faces snout deep in dinner.)
I have to speculate that maybe, just maybe, some of the spiders are eating their siblings.
