Craig Reynolds
@craigreynolds.bsky.social
Unaffiliated researcher, retired software guy. Interested in computational models of natural complexity, especially collective motion and camouflage coevolution. Graphics, animation, evolutionary computation.
https://www.red3d.com/cwr/
https://www.red3d.com/cwr/
iNaturalist thinks this is the caterpillar of a Genista Broom Moth (Uresiphita reversalis). Found on a fence in my neighborhood, San Francisco Bay Area.
November 11, 2025 at 11:56 PM
iNaturalist thinks this is the caterpillar of a Genista Broom Moth (Uresiphita reversalis). Found on a fence in my neighborhood, San Francisco Bay Area.
This must be the same doe and fawn. Apparently they like our neighborhood and have become permanent residents.
November 11, 2025 at 10:00 PM
This must be the same doe and fawn. Apparently they like our neighborhood and have become permanent residents.
I wrote a paper on simulating the coevolution of camouflage in nature. The “background environments” were photos from nature, including several sets of leaves on ground, like this one of coastal oak. (Overlaid here with synthetic camouflaged “prey” evolving over time.) arxiv.org/abs/2304.11793
November 11, 2025 at 3:20 PM
I wrote a paper on simulating the coevolution of camouflage in nature. The “background environments” were photos from nature, including several sets of leaves on ground, like this one of coastal oak. (Overlaid here with synthetic camouflaged “prey” evolving over time.) arxiv.org/abs/2304.11793
Trump’s foe in tariffs case? A legal group funded by conservatives.
The Supreme Court test of Trump’s power is backed by a group funded without disclosure by wealthy conservatives, highlighting a deep split over import taxes.
Open archived WaPo link: d0ikm1dwdl59f4.archive.ph/uxkws/98a8a0...
The Supreme Court test of Trump’s power is backed by a group funded without disclosure by wealthy conservatives, highlighting a deep split over import taxes.
Open archived WaPo link: d0ikm1dwdl59f4.archive.ph/uxkws/98a8a0...
November 5, 2025 at 5:17 PM
Trump’s foe in tariffs case? A legal group funded by conservatives.
The Supreme Court test of Trump’s power is backed by a group funded without disclosure by wealthy conservatives, highlighting a deep split over import taxes.
Open archived WaPo link: d0ikm1dwdl59f4.archive.ph/uxkws/98a8a0...
The Supreme Court test of Trump’s power is backed by a group funded without disclosure by wealthy conservatives, highlighting a deep split over import taxes.
Open archived WaPo link: d0ikm1dwdl59f4.archive.ph/uxkws/98a8a0...
Saw this doe and fawn today. Good chance they are the same ones featured in the doorbell cam video above. The two locations were maybe 50 feet apart. But we are up to our keisters in deer around here (hills above SF Bay) so these might be a different pair.
November 3, 2025 at 11:17 PM
Saw this doe and fawn today. Good chance they are the same ones featured in the doorbell cam video above. The two locations were maybe 50 feet apart. But we are up to our keisters in deer around here (hills above SF Bay) so these might be a different pair.
Earlier work on related topics by some of the same authors.
Morphogenesis of termite mounds. 2019. Samuel A. Ocko, Alexander Heyde, and L. Mahadevan. doi.org/10.1073/pnas...
Morphogenesis of termite mounds. 2019. Samuel A. Ocko, Alexander Heyde, and L. Mahadevan. doi.org/10.1073/pnas...
November 3, 2025 at 12:31 AM
Earlier work on related topics by some of the same authors.
Morphogenesis of termite mounds. 2019. Samuel A. Ocko, Alexander Heyde, and L. Mahadevan. doi.org/10.1073/pnas...
Morphogenesis of termite mounds. 2019. Samuel A. Ocko, Alexander Heyde, and L. Mahadevan. doi.org/10.1073/pnas...
From our doorbell cam today. First mom comes up to snack on our plants. Then mom's “gentleman caller” follows her. Then junior joins the parade.
#deer
#nature
#photography
#deer
#nature
#photography
November 2, 2025 at 12:07 AM
From our doorbell cam today. First mom comes up to snack on our plants. Then mom's “gentleman caller” follows her. Then junior joins the parade.
#deer
#nature
#photography
#deer
#nature
#photography
Fun geeking out on this analysis of natural termite nest construction and reconstruction via simulation. Amazing shapes!
Self-organized biotectonics of termite nests. PNAS. 2021. Alexander Heyde, Lijie Guo, Christian Jost, Guy Theraulaz, L. Mahadevan. www.pnas.org/doi/full/10....
#ALife
#stigmergy
Self-organized biotectonics of termite nests. PNAS. 2021. Alexander Heyde, Lijie Guo, Christian Jost, Guy Theraulaz, L. Mahadevan. www.pnas.org/doi/full/10....
#ALife
#stigmergy
November 1, 2025 at 6:27 PM
Fun geeking out on this analysis of natural termite nest construction and reconstruction via simulation. Amazing shapes!
Self-organized biotectonics of termite nests. PNAS. 2021. Alexander Heyde, Lijie Guo, Christian Jost, Guy Theraulaz, L. Mahadevan. www.pnas.org/doi/full/10....
#ALife
#stigmergy
Self-organized biotectonics of termite nests. PNAS. 2021. Alexander Heyde, Lijie Guo, Christian Jost, Guy Theraulaz, L. Mahadevan. www.pnas.org/doi/full/10....
#ALife
#stigmergy
I was reading this substack thinking “this sounds just like what Scott Galloway was saying the other day.” Galloway's prediction seemed quite plausible to me.
Could China devastate the US without firing a shot?
garymarcus.substack.com/p/could-chin...
— @garymarcus.bsky.social
#llm #moat #china
Could China devastate the US without firing a shot?
garymarcus.substack.com/p/could-chin...
— @garymarcus.bsky.social
#llm #moat #china
October 29, 2025 at 3:36 PM
I was reading this substack thinking “this sounds just like what Scott Galloway was saying the other day.” Galloway's prediction seemed quite plausible to me.
Could China devastate the US without firing a shot?
garymarcus.substack.com/p/could-chin...
— @garymarcus.bsky.social
#llm #moat #china
Could China devastate the US without firing a shot?
garymarcus.substack.com/p/could-chin...
— @garymarcus.bsky.social
#llm #moat #china
¡Yo voté! Yes on CA Prop 50.
It's sad California has to hold a special election for this. And I'm disappointed that we have to undo the progressive nonpartisan redistricting commission that we fought hard to adopt in 2008. But I am thrilled to push back against the corrupt Trump/Abbot/Texas plan.
It's sad California has to hold a special election for this. And I'm disappointed that we have to undo the progressive nonpartisan redistricting commission that we fought hard to adopt in 2008. But I am thrilled to push back against the corrupt Trump/Abbot/Texas plan.
October 26, 2025 at 1:13 AM
¡Yo voté! Yes on CA Prop 50.
It's sad California has to hold a special election for this. And I'm disappointed that we have to undo the progressive nonpartisan redistricting commission that we fought hard to adopt in 2008. But I am thrilled to push back against the corrupt Trump/Abbot/Texas plan.
It's sad California has to hold a special election for this. And I'm disappointed that we have to undo the progressive nonpartisan redistricting commission that we fought hard to adopt in 2008. But I am thrilled to push back against the corrupt Trump/Abbot/Texas plan.
LA Times coverage:
“How military’s ‘safe’ plan to fire munitions over I-5 went off the rails with CHP cruiser hit”
archive.ph/y7z7S
“How military’s ‘safe’ plan to fire munitions over I-5 went off the rails with CHP cruiser hit”
archive.ph/y7z7S
October 20, 2025 at 5:56 PM
LA Times coverage:
“How military’s ‘safe’ plan to fire munitions over I-5 went off the rails with CHP cruiser hit”
archive.ph/y7z7S
“How military’s ‘safe’ plan to fire munitions over I-5 went off the rails with CHP cruiser hit”
archive.ph/y7z7S
My wife shared this well-written description with me today (original at social.coop/@DrewKadel/1...)
October 19, 2025 at 3:18 PM
My wife shared this well-written description with me today (original at social.coop/@DrewKadel/1...)
I've gotten into diptychs recently:
October 19, 2025 at 12:06 AM
I've gotten into diptychs recently:
My dad (right) was old school antifa. US Army Infantry. Fought fascists in Italy in WW2.
October 18, 2025 at 4:25 PM
My dad (right) was old school antifa. US Army Infantry. Fought fascists in Italy in WW2.
October 18, 2025 at 2:48 PM
One tiny cloud got separated from the rest of the flock. San Francisco Bay Area.
#photography
#nature
#photography
#nature
October 12, 2025 at 6:30 PM
One tiny cloud got separated from the rest of the flock. San Francisco Bay Area.
#photography
#nature
#photography
#nature
My dad (right) was old school antifa. US Army Infantry. Fought fascists in Italy in WW2.
October 11, 2025 at 11:45 PM
My dad (right) was old school antifa. US Army Infantry. Fought fascists in Italy in WW2.
Saigon 1968, Chicago 2025.
October 8, 2025 at 12:36 AM
Saigon 1968, Chicago 2025.
October 7, 2025 at 10:24 PM
I read Jennifer's post yesterday. This morning, my daughter, a fan of all creatures, showed me this image of Sal, the Tamandua (a type of anteater), enjoying his yogurt snack. I want to believe this is Yoplait's new ant flavored yogurt.
www.facebook.com/photo.php?fb...
www.facebook.com/photo.php?fb...
October 4, 2025 at 3:59 PM
I read Jennifer's post yesterday. This morning, my daughter, a fan of all creatures, showed me this image of Sal, the Tamandua (a type of anteater), enjoying his yogurt snack. I want to believe this is Yoplait's new ant flavored yogurt.
www.facebook.com/photo.php?fb...
www.facebook.com/photo.php?fb...
Rep. Madeleine Dean (D-Pa.) confronted House Speaker Mike Johnson over Trump posting a deepfake video…depicts Jeffries donning a sombrero and handlebar mustache and Schumer saying Democrats “have no voters left because of our woke, trans bulls—,” mariachi music plays…
thehill.com/homenews/hou...
thehill.com/homenews/hou...
October 1, 2025 at 6:48 AM
Rep. Madeleine Dean (D-Pa.) confronted House Speaker Mike Johnson over Trump posting a deepfake video…depicts Jeffries donning a sombrero and handlebar mustache and Schumer saying Democrats “have no voters left because of our woke, trans bulls—,” mariachi music plays…
thehill.com/homenews/hou...
thehill.com/homenews/hou...
Good morning! Look north toward San Francisco. #photography
September 30, 2025 at 2:34 PM
Good morning! Look north toward San Francisco. #photography