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David Forester

@arborscientiae.bsky.social
329 followers 211 following 759 posts

I teach astronomy, biology, and chemistry, and I coach esports. Hobbies include hiking, biking, climbing, drumming, gaming, and photography.

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Reposted by David Forester
Hank Green @hankgreen.bsky.social · 05/10/2026
The hilarious thing about Whole Foods banning MSG is that Whole Foods is, nonetheless, packed full of MSG.
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David Forester @arborscientiae.bsky.social · 07/10/2026
@hankgreen.bsky.social Today's 4x3 still claims it can't load. Just FYI.
A screenshot of the 4x3 game board taken on October 7th, 2026. There is a pop-up message that reads, "Couldn't load today's puzzle, so this is a practice board. It won't count, but you can play! Refresh to try again." The game has a 3x3 grid of gray boxes with words in white text. The nine words fit into four categories of three words each, with one word being an anchor word that shows up in every category. The words are 'heavy', 'glam', 'grave', 'somber', 'death', 'nine', 'middle', 'one', and 'welter'.
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Laura Hollister @xenolith.bsky.social · 06/10/2026
Fuck yes! This!!!!!!
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David Forester @arborscientiae.bsky.social · 04/10/2026
I wanted to make some clever quip about how the temperature where I live reached 104°F on 2026-10-4, but I checked and it actually got all the way up to 106°F in my backyard, which may have been in the running for an all-time October record, except yesterday was even hotter.
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David Forester @arborscientiae.bsky.social · 17/09/2026
@hankgreen.bsky.social Squid have two tentacles and eight arms, octopuses have just the eight arms.
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Caltech IPAC @caltechipac.bsky.social · 30/08/2026
"There is so much out there to explore," said Patrick Lowrance, the Roman Science Support Center co-lead at IPAC. Congrats to NASA's Nancy Grace Roman Space Telescope on a successful launch 🚀 🔭 🧪 ⚛️ 👩‍🔬 www.ipac.caltech.edu/news/ready-t...
ipac.caltech.edu
Ready to Roman: Caltech Teams Celebrate Telescope Launch, Look Ahead to Future
The next generation of exoplanet imaging technology, designed and built at NASA's Jet Propulsion Laboratory (JPL), which Caltech manages for the agency, has launched aboard NASA's Nancy Grace Roman Sp...
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Reposted by David Forester
By Cory Doctorow (GPG 0xBF3D9110957E5F4C) @doctorow.pluralistic.net · 21/08/2026
AI is alarming for many reasons: it's a dangerous financial bubble, an environmental catastrophe, and a tool for eroding wages and labor power. But in addition to all that, AI is an epistemic disaster. 1/
The North Pole at night, hand-tinted in blues and purples so it looks more like a moonscape. Protruding from the ice is the cross-sectioned head and neck of a man, his brains on display. Stepping over the leftmost mountains is a killer pulp robot, about to crush the head. Leaning against the rightmost mountains is a sneering, princely toff in a red frock coat, holding a cane that has penetrated the decapitated skull and lodged in the brains.
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Sky Marchini @sky.skymarchini.net · 08/08/2026
this is an admission of a crime btw; superpacs cannot coordinate with candidates
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Save Standard Time @savestandard.bsky.social · 02/08/2026
“Morning sunlight is the single strongest signal for regulating when you feel alert, and it is far more powerful than indoor light.”
Column chart of morning sunlight exposure comparing the status quo (97% of urban Americans seeing sunlight before 8am) to permanent DST (13%).
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David Forester @arborscientiae.bsky.social · 01/08/2026
A long but good thread about perverse incentives around AI in the business world, and the smoke and mirrors games that are letting it drag on longer than it should, wasting resources at multiple levels all along the way. Essay version linked in Doctorow's second post.
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David Forester @arborscientiae.bsky.social · 31/07/2026
@schiff.senate.gov @padilla.senate.gov Please vote NO on HR 139. @mikelevin.org Please vote YES on HR9638 for permanent Standard Time. As both an astronomy teacher and a parent, I'm telling you that this is the better option. We had permanent DST once, it lasted a year. Standard should be standard
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David Forester @arborscientiae.bsky.social · 21/07/2026
@phaneritic.bsky.social saw some cool rocks on top of San Jacinto while backpacking and thought of you. Sorry I didn't get any full 3D scans.
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David Forester @arborscientiae.bsky.social · 05/07/2026
I feel bad for all the people who went into the park to see the fireworks...
View from the top of a parking garage looking down onto the launch site for the 4th of July fireworks at Legoland California.
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David Forester @arborscientiae.bsky.social · 04/07/2026
Not surprising, but still sad. I asked my 8yo what happened on this day 250 years ago, they responded "we declared independence." "From who?" "England". The bar is on the ground and half the country couldn't step over.
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David Forester @arborscientiae.bsky.social · 03/07/2026
@realinfowars.bsky.social just blew this wide open. The Phoenicians made secret tunnels, took over hell, and then encoded numerological messages in the Declaration of Independence taking credit for the plagues! youtu.be/tdSB8muDtzc?...
youtu.be
WELCOME TO THE REAL INFOWARS
YouTube video by The Onion
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David Forester @arborscientiae.bsky.social · 02/07/2026
Funny, I could have sworn that once upon a time he claimed he was going to be losing money by becoming president since he would miss out on so many business opportunities. Surprise, surprise, he wasn't content to actually miss out.
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David Forester @arborscientiae.bsky.social · 28/06/2026
Pretty sure my 3 y.o. has been taking notes from Sampson (Romeo and Juliet). I told them to stop hissing at the cat and they denied it, then when pressed said, "I'm not hissing at *that* one". They knew the law was not on their side if they said ay.
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David Forester @arborscientiae.bsky.social · 27/06/2026
Only slightly unrelated, there's an opportunity for a sequel here: "Who Framed Roger Rabbit 2: Electric Boogaloo", about diverting power from Toontown to run a data center, and replace toons with AI agents.
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David Forester @arborscientiae.bsky.social · 24/06/2026
@hankgreen.bsky.social Grellow, then Grue, now... Blurple? One of these days I will nail it! Side note: This should be a "God Damnit!" as well.
Score screen for the June 24th 4x3 game. Blue and purple got swapped, otherwise it would have been a perfect game.Score screen for the June 23rd 4x3 game. Blue and green got swapped, otherwise it would have been a perfect game. Background is red and it says "God Damnit!"Score screen for the June 22nd 4x3 game. Yellow and green got swapped, otherwise it would have been a perfect game. Background is red and it says "God Damnit!"
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David Forester @arborscientiae.bsky.social · 22/06/2026
Happy solstice! ☀️🌍
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@NewsJennifer (Jennifer Schulze) @newsjennifer.bsky.social · 18/06/2026
This is a disgrace. "A major flu outbreak has sickened nearly 160 troops at Lackland Air Force Base in Texas less than two months after Defense Secretary Pete Hegseth announced that U.S. troops would no longer be required to be vaccinated for the flu." www.nytimes.com/2026/06/18/u...
nytimes.com
Scores Fall Ill at Air Force Base After Hegseth Makes Flu Vaccine Optional
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Buttons (Ashley) 🏴‍☠️#OFMDForLife🏴‍☠️ 🏳️‍🌈🤡 @sevensugars.bsky.social · 17/06/2026
Since I did do my PhD in cyanobacteria growth and treatment optimization modeling AND work in the water treatment industry, I’m gonna share my theory as to what’s happening here and how to fix it. People are focusing on the painted bottom of the pool increasing residual heat, and while that 1/19
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Robert Reich @rbreich.bsky.social · 13/06/2026
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Marisa Kabas @marisakabas.bsky.social · 12/06/2026
this is my pandacam www.youtube.com/live/aAhm880...
youtube.com
LIVE: See Donald Trump’s name come off the Kennedy Center as it happens
YouTube video by MS NOW
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Adam Keiper @adamkeiper.com · 12/06/2026
This ocean-monitoring system was built over the past decade, and planned for decades before that. It cost hundreds of millions of taxpayer dollars. And Trump is dismantling it. It's fucking obscene. It's the moral equivalent of shooting a missile to blow up the Hubble Space Telescope.
thebulwark.com
Trump Just Gutted A Major Line of Oceanic Defense
Just in time for hurricane season, the Trump administration is defunding its global ocean-monitoring system.
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David Forester @arborscientiae.bsky.social · 10/06/2026
Yet another crappy thing is Musk's fault. (This corroborates what I heard from an emergency management specialist in March of this year)
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David Forester @arborscientiae.bsky.social · 09/06/2026
Time to make myself a custom website to use as my own homepage again, with links to all of these and more. I don't even need to host it online, just have the local HTML file.
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Ryan J Hollister @phaneritic.bsky.social · 22/05/2026
Cowardly bigots.
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The Onion @theonion.com · 12/05/2026
Gas Station Price Sign Using Scientific Notation
Gas Station Price Sign Using Scientific Notation
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David Forester @arborscientiae.bsky.social · 12/05/2026
Slightly increase a band: 4 Friday Tepidplay
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PaAAAAAAAAH!!!z Pardo @pazsays.bsky.social · 10/05/2026
tech ceo: we regret to inform you that the torment created by the Torment Nexus is the fault of the depraved author of beloved novel DON’T CREATE THE TORMENT NEXUS
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David Forester @arborscientiae.bsky.social · 09/05/2026
I already knew this, and I already do this, but this post reminded me that it isn't necessarily common knowledge so I'm sharing it to raise awareness.
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IntrepidGirlSleuth @annakeesey.bsky.social · 05/05/2026
NIMBY means, “I want its benefits, but won’t tolerate its difficulties,” e.g.homeless shelter, incinerator, municipal dump, airport runway. Anti-data-center is frequently anti-AI altogether. It’s saying, “This isn’t valuable, we don’t want it at all.” So there’s a big difference.
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Mar Hicks @histoftech.bsky.social · 30/04/2026
Study finds that students using chatGPT learned and remembered less than students who did not use it. www.sciencedirect.com/science/arti...
sciencedirect.com
ChatGPT as a cognitive crutch: Evidence from a randomized controlled trial on knowledge retention
The rapid integration of generative artificial intelligence into higher education has outpaced empirical understanding of its effects on fundamental l…
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David Forester @arborscientiae.bsky.social · 26/04/2026
Film you've watched more than six times with a gif. Hard mode: no Star Trek, Star Wars, LOTR, DC, Marvel, Disney, Pixar, Spielberg, Cameron, Wachowskis, or Ghibli.
media.tenor.com
Astronaut Jim Lovell (by Tom Hanks) says, "Houston, we have a problem." The clip is from Apollo 13.
Alt: Astronaut Jim Lovell (by Tom Hanks) says, "Houston, we have a problem." The clip is from Apollo 13.
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Allison Gill @muellershewrote.com · 25/04/2026
Sorry, but if you’re mad that the Southern Poverty Law Center paid informants to infiltrate Nazi groups to expose them, then you are a Nazi.
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David Forester @arborscientiae.bsky.social · 25/04/2026
Jacquelyn Gill dropping knowledge! There are a myriad of factors negatively impacting the free and public education that our youth deserve, and most of the biggest ones are outlined in this thread.
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Robert Reich @rbreich.bsky.social · 24/04/2026
The richest man owns X. The second and fourth richest men control Google. The third richest man owns The Washington Post. The fifth richest man owns Facebook, Instagram, and WhatsApp. And now the sixth richest could soon take over both Paramount and Warner Bros. See the problem here?
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The Tennessee Holler @thetnholler.bsky.social · 19/04/2026
“Somebody shorted the oil markets today by hundreds of millions of dollars exactly 20 minutes before Trump made his announcement that everything was going to be great. And if you see that once, it could be a coincidence. But that’s happened at least 3x… a pattern.” The most corrupt regime ever.
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David Forester @arborscientiae.bsky.social · 17/04/2026
An acquaintance and I were climbing down from Longs Peak in the Rockies, suddenly a storm blew over from the other side of the mountain. We scrambled over boulders in the wind and the rain, climbed through "The Keyhole" and took shelter just as lightning was starting to strike on all sides.
"The Keyhole" part way up Long's Peak, to the left you can see a storm shelter made of nearby stones where people can hunker down in dangerous weather. The keyhole is an opening in a natural stone wall that you must climb through to get to the other side and take the safest path to the summit.
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David Forester @arborscientiae.bsky.social · 15/04/2026
Post a picture of yourself as a doctor
Aragorn, from the Lord of the Rings: Return of the King, after he has been crowned king of Gondor. A man with long brown hair and a beard is wearing a metal crown that matches his plate and chainmail armor. Behind him is bass relief artwork on a stone wall.
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[seasonal] pacanukeha❌ @pacanukeha.bsky.social · 12/04/2026
image slightly editing to make more of the earth visible and then superimposed with the "always has been" meme starting with "wait, was the mission just to update this meme?'
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Emily Lakdawalla 🏳️‍⚧️ Uranus Expert @elakdawalla.bsky.social · 11/04/2026
What a great photo just added on the NASA Johnson Flickr page www.flickr.com/photos/nasa2...
Artemis II Return
NASA's Orion spacecraft carrying Artemis II Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch from NASA, along with Mission Specialist Jeremy Hansen from the CSA (Canadian Space Agency), splashes down in the Pacific Ocean near San Diego, California, at 5:07 p.m. PDT, (8:07 p.m. EDT) on Friday, April 10, 2026. The Artemis II test flight launched on Wednesday, April 1, from NASA’s Kennedy Space Center in Florida to begin its 10-day journey around the Moon for scientific discovery, economic benefits, and to build on our foundation for the first crewed missions to Mars. NASA’s Landing and Recovery team and the U.S. military are coordinating efforts to extract the Artemis II crew from the Orion spacecraft. Credit: NASA/Josh Valcarcel
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Ironica @ironica.bsky.social · 10/04/2026
People who don't like traffic should stay home.
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David Forester @arborscientiae.bsky.social · 10/04/2026
Green ink is better than blue or black.
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Katie Mack @astrokatie.com · 07/04/2026
Oh this is great: there’s now an #Artemis II Lunar Flyby Gallery on the NASA images site: www.nasa.gov/gallery/luna... (thx @dpmanchee.bsky.social for pointing it out)
nasa.gov
Lunar Flyby - NASA
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David Forester @arborscientiae.bsky.social · 07/04/2026
I was watching the Artemis 2 live stream when I looked out my window and saw a different rocket moving across the horizon!
The trail of a rocket going from right to left just above the horizon at twilight. The higher it goes into the sky the more it is illuminated by the sun, the bottom right portion is tinted red from the sunset just over the horizon. The left side of the trail expands into a teardrop shape as the lower pressures higher in the atmosphere allow the rocket engines to propel gases further in every direction. Below the trail are the silhouettes of several trees, one of which is large enough to block the small gap in the rocket trail due to an engine shut off.
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Katie Mack @astrokatie.com · 06/04/2026
Some lunar vocabulary in case you're following along with the #Artemis II flyby: * albedo: reflectiveness (high albedo=very shiny) * mare/maria(plural): from Latin for "sea," dark regions on the Moon, which are dried lava basins * terminator: the line of the transition between sunlight & darkness
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Jeremy Berg @jeremymberg.bsky.social · 02/04/2026
The Artemis II launch as seen by NOAA!
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