Greetings from Pemmi-Con, the 15th occasional North American Science Fiction Convention, in Winnipeg, Manitoba!
DEAR READER

tannertan36
Stranger Things
AnasAbdin
he wasn't even looking at me and he found me
NASA
Today's Document

Product Placement

titsay

romaâ

blake kathryn
we're not kids anymore.

if i look back, i am lost

â
Not today Justin
Sade Olutola
RMH

ellievsbear
PUT YOUR BEARD IN MY MOUTH

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@man-and-atom
Greetings from Pemmi-Con, the 15th occasional North American Science Fiction Convention, in Winnipeg, Manitoba!

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(Via @luxomancer over at Bluesky, who's also looking for the person to credit for the image)
ETA for confused folks from other sides of the Atlantic: There are some people on this side of the water (and indeed, even some in North America) who're currently claiming loudly that air conditioning is "a waste of valuable resources"... even when people, in the new hotter world we're living in, are (particularly in some more easterly parts of Europe) dying for the lack of it.
Funny that such folks don't make such claims for heating in the winter, which routinely uses more energy than cooling.
We'll see how long this BS lasts as these two islands get hotter in years to come... and when people are forced to live on in housing stock that was purposefully built to hold heat in, not let it out.
Things are changing...
What is particularly fascinating is that the same people who decry summer airâconditioning are often found demanding the installation of more heat pumps for winter use. They seem not to realize that these are two names for the same machine. They also seem not to realize that, in territories where heat pump installations are common, one of the main reasons is that they do dual duty. These are expensive machines, and the energy savings over a furnace if they run (say) four months a year is not always a conclusive argument.
We see no good in the hair shirt asceticism that despises air conditioning (or space cooling if we want to be clearer) as âmerely a matter of comfortâ. Comfort is not something to be despised! In fact, however, artificial temperature regulation has a host of benefits. Setting to one side the prevention of heat exhaustion among vulnerable people, it helps hold back mold and mildew, and insect infestations, which can be very costly as well as injurious to human health.
In cities served by large thermal power stations, a great savings in energy can be made by the use of âabsorptionâcycleâ chillers fed from a districtâheating network. In some climates, this warmâweather load may be the economic difference that makes district heating viable. We have some information about this somewhat mindâbending technology (patented by Albert Einstein and Leo Szilard) here and here.
Seems legit
we all hear about kudzu being introduced as "erosion control" in the South but I don't think contemporary people understand on a gut level what that means
these are images from a 1930s pamphlet that endorsed kudzu, entitled "stop gullies: save your farm"
It was Bad.
Invasive plants need to be understood as part of a much larger cycle of incredible violence against the land.
For context: erosion on that scale occurred as a result of our clear-cutting entire states. The land east of the Mississippi used to be covered in old-growth forest to an extent that we literally canât imagine anymore, because most of us have never seen a forest over 100 years old. It turns out if you remove all vegetation from a landscape, you end up with a bunch of loose soil ready to move downstream. A fast-growing plant that covers everything in dense vegetation sounds like salvation when youâre surrounded by 40-foot deep gullies that get wider with every rainstorm.
It must be emphasized that scientific agronomy began less than 200 years ago, with Justus von Liebigâs studies of plant nutrition, and went down many blind alleys in its first hundred years. Europeans had brought to the Americas crops and practices which were not suited to the land, and which they tried to make work by main force. They also brought ideas which did not suit the conditions, such as, that if land would not grow trees it would not grow crops.
Many people today would like to say, âthey should have taken guidance from indigenous practices!â But those practices succeeded in supporting perhaps four million people in the entire vast land area we now refer to as the USA and Canada [out of perhaps 50 millions in the Americas as a whole, emphasis for the person calling me abusive names because they lack reading comprehension], one per cent of the current figure. Worse still, the native peoples were constantly engaged in brutal and often genocidal warfare, which served to keep their populations down to the level that could be supported by their food supplies. Even people with no preâconceived notions of their own superiority would have questioned the value of such examples.
Today we live in a world of eight thousand million humans. In such a world, to protect biodiversity and leave any land at all untouched by human use requires intensive agriculture, interâregional trade in foodstuffs, refrigeration and other modes of food preservation, and the use of synthetic chemistry to substitute for nonâfood crops. The crucial question that we must face is this : is âsustainabilityâ, which means longâterm survival, only possible at a low level of material culture with small populations, or can we beat Parson Malthusâ game?
A very ambitious NASA announcement set back by a very big explosion, the end of âBeyond Petroleumâ and other items from the Financial Times, some museums in Britain, my further travels, and other notes of interest.
Direct link to archive recording [192 kbps MP3, 40 MB]
2026 June 13
Interplanetary Earth Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA & NASA / JHU Applied Physics Lab / Carnegie Inst. Washington
Explanation: In an interplanetary first, on July 19, 2013 Earth was photographed on the same day from two other worlds of the Solar System, innermost planet Mercury and ringed gas giant Saturn. Pictured on the left, Earth is the pale blue dot just below the rings of Saturn, as captured by the robotic Cassini spacecraft then orbiting the outermost gas giant. On that same day people across planet Earth snapped many of their own pictures of Saturn. On the right, the Earth-Moon system is seen against the dark background of space as captured by the sunward MESSENGER spacecraft, then in Mercury orbit. MESSENGER took its image as part of a search for small natural satellites of Mercury, moons that would be expected to be quite dim. In the MESSENGER image, the brighter Earth and Moon are both overexposed and shine brightly with reflected sunlight. Destined not to return to their home world, both Cassini and MESSENGER have since retired from their missions of Solar System exploration.
â Source: apod.nasa.gov/apod/ap260613.html

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This 1998 booklet [PDF, 18 MB] gives the impression that it was meant to accompany a video presentation, and we should very much like to know if that was so, and if so, whether anyone can track down the video.
The really odd part is at the back. The last few pages are dedicated to information about a specific power plant, leading us to believe that the booklet was produced in several versions, perhaps for distribution at the visitor centers of different power plants. But the information at the end of this booklet about nuclear power is about a hydro station!
It must be explained that the only inland nuclear power station in Britain was Trawsfynydd in North Wales, a 550 MW station which started up in 1965 and operated until 1991 â that is, it shut down years before this booklet was issued. Trawsfynydd nuclear station used for cooling the lake created in the 1920s to feed the 30 MW Maentwrog hydro station, which was thereafter operated as an auxiliary of the nuclear plant. And so the data pages of this booklet refer to Maentwrog, which is currently operated by the Nuclear Decommissioning Authority.
More of our scanned nuclearâenergy publicâinformation booklets can be found here.
This booklet came to us in pretty bad shape, with serious water damage.
The scan of the full booklet is here, and the text and images are largely intact.
These amusing images are from a booklet intended for children, entitled Nuclear KnowâHow! With an element of truth, put out by the Central Electricity Generating Board in Britain. The printing date appears to be 1980, but judging by the style, it may have been created some years earlier.
Sunspot with Light Bridge
Credits: Mark Johnston
From a 1980 pamphlet advertising the Central Electricity Generating Boardâs speakersâbureau service and powerâplant tours.
See the whole thing here.

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We would very much like to get our hands on the booklets and wall charts mentioned in this booklet.
See the complete scan here.
OldburyâonâSevern (?), Trawsfynydd, and Sizewell A nuclear power stations.
Find the scan of the whole, informative and beautifully illustrated, booklet here.
Find the complete scan of this booklet here.
Blackpool again? My recent visit to a Nuklearia meetup, a degree of comeuppance for Gerhard SchrĂśder, various recent industrial accidents, performanceâenhancing drugs in sport, and an answer to a question from SDFer jlamothe about the possibilities of nuclear power for the Yukon Territory.
Direct link to archive recording [192 kbps MP3, 40 MB]
Maria SkĹodowska-Curie (1867-1934) was the first woman to win a Nobel Prize, the first person to win two Nobel Prizes, and is still the only person to this day who has her awards in two different fields.
On July 4, 1934, she passed away from aplastic anemia, or the lack of production of red blood cells, directly caused by her long-term exposure to radiation. Today we remember her for her contributions to humanity.
DziÄkujÄ, Maria!
Both Becquerel and Pierre Curie had to threaten to refuse the prize for discovery of radioactivity and radioelements, before the Nobel Committee would agree to include Marie in it. Both of them were quite insistent that her contributions were of central importance to the overall work. It was her insight as a chemist which reâdirected their attention from fluorescent substances (a line of inquiry initially suggested by RĂśntgenâs discovery of Xârays) to the heavy elements, leading to the discovery of the radioactivity of thorium, which none of the physicists who had been inspired by Becquerelâs initial publication had bothered to check.
In this film (Italian language, apparently produced in multiple language versions in Germany in the 1960s) you can see dramatizations of the research and experiments by the Curies and others which led to the discovery and understanding of radioactivity, radioactive elements, the modes of decay, and ultimately the atomic nucleus itself. This work, which began less than 130 years ago, is fundamental to our modern understanding of the world on all scales â without knowledge of the nucleus, astronomy and cosmology as we know them would be impossible, because we would not understand the energy source and evolution of stars.
Interestingly, specialists in the relevant fields generally believe that the radiation poisoning which killed Mme Curie was due less to her work with radium and polonium, than to her service in the First World War. In the laboratory she observed safety precautions to the extent anyone had ever thought of them, but while taking Xârays of wounded French soldiers she often worked long past the point of developing radiation burns.

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I just googled this and⌠yes, itâs absolutely real.
And there are so many articles and videos and discussions. Like, the scientific community is buzzing about this.
So much research will have to be redone because the data was absolutely compromised, off by orders of magnitude, by using standard lab gloves.
The world is probably not horrifically contaminated by microplastics. Sterile laboratories, however, are contaminated by latex and nitrile gloves.
Thank God someone bothered to check.
>I just googled this and⌠yes, itâs absolutely real.
Sources beyond dude just trust me, for the skeptics.
Scientists may have been unknowingly inflating microplastics pollution estimates, and the surprising source could be their own lab gloves. A
https://www.technologynetworks.com/applied-sciences/news/scientists-lab-gloves-may-be-causing-an-overestimation-of-microplastics-411138
Nitrile and latex gloves that scientists wear while they are measuring microplastics may lead to a potential overestimation of the tiny poll
Nitrile and latex gloves may cause overestimation of microplastics - Phys.org (itâs a pdf)
Researchers discovered a standard piece of lab equipment has added thousands of microplastic âfalse positivesâ per each square-millimeter un
Ordinary Lab Gloves May Have Skewed Microplastic Data: That doesnât mean microplastics arenât a problem, though
That should be enough
Central to the work of the natural sciences is verifying oneâs own results and those of other investigators, a task which is not complete without delving into the methods by which those results were obtained.
Unfortunately, the mass media, and even the scientificallyâinclined public, do not tend to wait for that painstaking and timeâconsuming work. So, for instance, we heard much about the amazing and even revolutionary results in neuroscience from âfunctional Magnetic Resonance Imagingâ ; and then someone tried fMRI on a dead fish. As it turned out, many fMRI studies were utterly meaningless because of sloppy experimental technique.
2026 May 24
A Martian Eclipse: Phobos Crosses the Sun Video Credit: NASA, JPL-Caltech, ASU MSSS, SSI
Explanation: Whatâs that passing in front of the Sun? It looks like a moon, but it canât be Earthâs Moon, because it isnât round. Itâs the Martian moon Phobos. The featured video was taken from the surface of Mars in 2022 by the Perseverance rover. Phobos, at 11.5 kilometers across, is 150 times smaller than Luna (our moon) in diameter, but also 50 times closer to its parent planet. In fact, Phobos is so close to Mars that it is expected to break up and crash into Mars within the next 50 million years. In the near term, the low orbit of Phobos results in more rapid solar eclipses than seen from Earth. The featured video is shown in real time â the transit really took about 40 seconds, as shown. The videographer â the robotic rover Perseverance (Percy) â continues to explore Jezero Crater on Mars, searching not only for clues to the watery history of the now dry world, but evidence of ancient microbial life.
â Source: apod.nasa.gov/apod/ap260524.html
The hurtling moons of Barsoom!
Brought to you, as always, by the plutoniumâ238 radioisotope thermoelectric generator, power source for the Mars Science Laboratory rovers.