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Martin Kroeker

@kroekermartin.bsky.social
264 followers 67 following 3.5K posts

Chemist drifted off into programming and mechanical CAD; Acting OpenBLAS maintainer. Always doing things I know too little about. 📍Germany

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Nina Willburger @drnwillburger.bsky.social · 04/10/2026

Meme with the text  “Motivational speaker: Unleash the lion inside you!” followed by "The lion inside me:" above two medieval drawings of weird looking lions.
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CrankyGrandma55 @crankygrandma55.bsky.social · 03/10/2026
First frog of the season and he's calling AND EATING. You can see the moth leg in his mouth
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Phil Knutson, PhD @philknutson.bsky.social · 01/10/2026
Lignin chemistry!! I’ve drawn a line tree with the lignin polymer behind it. I’ve drawn it as one single polymer throughout! This messy, highly irregular biopolymer gives plants structural strength and helps protect their cell walls. #sciart #chemsky
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Kieran 🦘🇨🇦 @hellbendermuseum.bsky.social · 02/10/2026
Proud to present my lifesize T. rex head, affectionately named Hannibal. I created this myself from start to finish- digital sculpture, resin 3D printing, painting, etc. Huge thanks to my friend @rj-palmer.com for instrumental crits and redlines during the sculpting process.
Life-size t rex head model from front 3/4 view. I am also in frameLife size t rex head model, from frontLife size t-rex model, from front and staring directly down the barrel of the camera
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Ian Hussey @ianhussey.mmmdata.io · 28/09/2026
Germany has cancelled funding for the German Cochrane Foundation. Bad news all around. Cochrane’s benefit to cost ratio is huge. @cochrane.org www.sueddeutsche.de/politik/wark...
sueddeutsche.de
Bund streicht renommierter Cochrane-Stiftung die Förderung
Die Cochrane-Stiftung, die seit Jahren die Nutzen medizinischer Therapien untersucht, soll künftig nicht mehr staatlich gefördert werden.
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Sajad Alipour @sajadalipour98.bsky.social · 24/09/2026
Allium derderianum Regel. Mazandaran, Iran July 2026 Elevation 2950m. Unfortunately, this species has disappeared from many of its natural habitats due to unsustainable and excessive harvesting by humans, particularly for its leaves and bulbs. #allium #botany #ecology #bulbplants
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Bernoid @bernoid.bsky.social · 21/09/2026
Chlorociboria aeruginascens. #MushroomMonday
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Quil @quilbug.bsky.social · 10/09/2026
Insectember day 8: Pyrops watanabei Common name: Lanternfly Wick the lanternfly does not hesitate to point its spear at any foe🤺 ✨Adopt Wick here: vgen.co/quilbug/shop 🎨 #insectember2026 #anthro #bugart #adopts
A digital drawing of an anthropomorphized white and yellow lanternfly holding a spear tipped with a sharp yellow crystal. The lanternflies wings drape like a cape around it, and its chitin plates look a bit like knight armour.
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Nina Willburger @drnwillburger.bsky.social · 18/09/2026
AQUAHUMAN! A hybrid figure merging human and fish-like features: scales, wide-open eyes, downturned corners of the mouth, distinctive traits reminiscent of sturgeons. Discovered at the Mesolithic settlement of Lepenski Vir, the sandstone sculpture dates to approximately 6200–5950 BC. 🧵1/3 📷 me
A rounded, roughly oval stone sculpture of a hybrid human-fish figure, featuring textured scales, wide-open eyes, and a mouth with downturned corners, displayed in a dark museum gallery
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Richard Lewington @rlewington2.bsky.social · 12/09/2026
Celebrating receiving an advance copy of my new Magnum Opus (with 4,000 images), by catching a Clifden Nonpareil on the same day.
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Sajad Alipour @sajadalipour98.bsky.social · 04/09/2026
Today, I had the unforgettable opportunity to visit Persepolis, one of the most remarkable surviving symbols of ancient Iran. Construction of this magnificent royal complex began under Darius I around 518 BCE. Pay close attention to the carvings on the stone walls
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Thibaut Brunet @thibautbrunet.bsky.social · 02/09/2026
🚨 New preprint alert! 🚨 Choanoflagellates reorganize their global cytoskeletal architecture within seconds to explore confined microspaces. This is the main PhD work of the amazing @maitefreired.bsky.social www.biorxiv.org/content/10.6... A tread 🧵⬇️
biorxiv.org
Rapid repurposing of microvillar content drives a flagellate-to-amoeboid switch in the closest relative of animals
Animal cells extensively remodel their cytoskeleton during differentiation and can notably switch between two major motility modes: flagellum-based swimming and actin-based crawling. We previously sho...
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Erin the Half-A-Bee @eemorrisart.bsky.social · 28/08/2026
"A Nook & A Book - The Friendly Frog" is done! I've redrawn this piece about three times over the last few years and I feel like the colors finally match the original idea that I had in my head. :3 (And it's in my @inprnt.com shop! www.inprnt.com/gallery/eemo...) #art #animalart #illustration
A frog lounges in a hammock and reads a book, iluminated by fireflies that it has captured in jars. The hammock sits on top of a floating wooden raft, which floats past lilypads and flowers during the purple dusk of evening.
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KetrinaDrawsALot @ketrinadrawsalot.bsky.social · 28/08/2026
Excited to reveal "Native Frogs & Toads of California", my entry for the art competition at the Berkeley Frog Fest! 🐸 #SciArt #amphibians
A poster illustrating the native frogs and toads of California, including those that formerly lived in the state
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Martin Kroeker @kroekermartin.bsky.social · 29/08/2026
Trying out the improved video... City musician Christiaan Winter playing carillon at the historic Cheese Market Scale Building in Alkmaar🇳🇱
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オワコマ @owarikomakix.bsky.social · 24/08/2026
ひっさびさのフィールド!ナガレヒキガエル合宿です。やはりお盆過ぎると渋いですね、、辛うじて1匹。当地らしい派手な個体。ナガレヒキは良いカエル。
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Martin Kroeker @kroekermartin.bsky.social · 23/08/2026
In the wineyards above Freiburg-St.Georgen
A white garden chair on dry grass between two rows of grapevines, with many grapes in various shades of red dangling from the vine behind and on either side of the chair
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Sajad Alipour @sajadalipour98.bsky.social · 19/08/2026
Onobrychis subnitens Bornm. Fabaceae West Azarbaijan, Mianeh June 2025
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Martin Kroeker @kroekermartin.bsky.social · 17/08/2026
youtu.be/ANhA94ZqnEQ
youtu.be
Strandbeest evolution 2025
YouTube video by theo jansen
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Jasmin LaBotaniste @labotaniste.bsky.social · 16/08/2026
Where the #wildflowers grow! #botany #Alps #Poschiavo
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Matt Bertone @bertonemyia.bsky.social · 15/08/2026
Another neat #bug from Costa Rica, but this time it's very smooth and beautiful, like a little abstract painting. I love the iridescent green punctures! Hnnnggg 😋 #Scutelleridae: #Pachycoris torridus
A smooth shield shaped bug sits on a white background facing right. It has orange to reddish circular markings, ringed with dark color on a light olive colored background. The body is covered with fine metallic green punctures.A smooth shield shaped bug sits on a white background facing right. It has orange to reddish circular markings, ringed with dark color on a light olive colored background. The body is covered with fine metallic green punctures.Close up of a smooth shield shaped bug showing orange to reddish circular markings, ringed with dark color on a light olive colored background, stippled with fine metallic green punctures.
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David @incnaturalist.bsky.social · 15/08/2026
Smooth as a horse’s ear, this stunning Saltwater croc gliding through the Singapore mangroves.
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Juliet Turner @juliet-turner.bsky.social · 12/08/2026
Eclipse in the sun glare over Oxford 🌙
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Kiabugboy @kiabugboy.bsky.social · 09/08/2026
Deltoblastus from Permian Nusa Tenggara Timur #3danimation #Blender3D #SciArt #paleoart
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Anthony Etherin @anthonyetherin.bsky.social · 07/08/2026
REMOTE METEOR (Sonnet) It sprints alone, a stone aglint — its tint and tone a throne of flint that twists and sparks its flight amidst the dark of night.
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壽堂 Moriyama Hisashi @kotobukido.bsky.social · 04/08/2026
自在ヒキガエル、完成
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Martin Kroeker @kroekermartin.bsky.social · 31/07/2026
Umm, is that a bat circling under the ceiling (while I'm sitting here with only the light from my laptop screen)... that's a new one, normally I go looking for _them_
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A Watercolour A Day @awatercolouraday.bsky.social · 31/07/2026
There you go!
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Igor Adameyko @adameykolab.bsky.social · 31/07/2026
The kissing of sea slugs. Reminds me of Gustav Klimt paintings. Elysia viridis, commonly known as the solar-powered sea slug or sap-sucking slug, is uniquely distinguished by its rare ability to steal plant-like cellular machinery from the algae it eats and use it to perform photosynthesis.
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dawn of the debb @debbshock.com · 30/07/2026
this owl has just about had it with the bullshit and me too
tired looking owl peeping out of a wooden thing.
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Stephan Spiekman @stephanspiekman.bsky.social · 29/07/2026
Excited to share our new paper in Science Advances! Led by Dr Wei Wang at #IVPP in Beijing, it presents a complete skeleton of #Austronaga, the most marine of all archosauromorphs. To boot, this fossil preserves the oldest complete digestive tract of any reptile! www.science.org/doi/10.1126/...
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Sajad Alipour @sajadalipour98.bsky.social · 26/07/2026
Echinops cephalotes Asteraceae Iran Esfahan Shahreza June 2026 Elevation 1700m Iran is a major center of diversity for the genus Echinops, with 72 species recorded in the Flora of Iran, including 57 endemic species. #Echinops #Asteraceae #wildflowers #botany
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Kiabugboy @kiabugboy.bsky.social · 25/07/2026
Sphaerirhynchia #brachiopod #3danimation #Blender3D #SciArt #paleoart
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Igor Adameyko @adameykolab.bsky.social · 24/07/2026
What a surprise - a tiny, 1 mm long planktonic bunny 🐰. This a chaetopterus worm larva. Kattegat, The North Sea 🌊 🔬 Chaetopterus, known as the parchment worm, is a highly specialized marine polychaete living the adult life inside self-constructed, papery tubes that resemble parchment paper.
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John Walters @johnwalterswildife.bsky.social · 24/07/2026
Hummingbird Hawk Macroglossum stellatarum emerged 830 am yesterday 36 days since egg laid 630 pm 17 June at Quince Honey Farm, South Molton, Devon - an amazingly quick life cycle. In this record year the caterpillars are fairly easy to find on Bedstraws growing in sunny spots like walls and dunes.
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Dr Mark D. Scherz @markscherz.bsky.social · 22/07/2026
This little pebble is Rhombophryne kilonjy, a small, poorly known and obscure species related to R. ellae and R. quentini but found in lowland forest close to the coast in northwestern Madagascar. The name kilonjy means ‘pebble’ in Malagasy because, well, just look at it. 🧪🐸 📸 F. Andreone
A pebble of a frog. It is round. It is pale beige. It has a smoky grey chevron on the back and a distinct curved fold of skin over the ear. It rests on a pile of leaves. There is almost a feeling that, hefted in the right way, it would skip well across a calm little lake. Please do not skip the frog.
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Dr Mark D. Scherz @markscherz.bsky.social · 22/07/2026
Rhombophryne quentini is an orange-thighed species from high-elevation in northern Madagascar. In 2020 I named the closely related R. ellae after my partner, Ella—so I took particularly great pleasure in naming this new species after our son, Quentin. A little family of frogs. 🧪🐸 📸 M. Vences
A rather chubby brown frog on a moss-covered log. It's not much to look at. But just wait.Hidden on those thighs of that bland brown frog were spots of bright orange, perhaps even red, and large black spots on the hips outlined with cream. It gives a very different picture of the animal! Here seen from behind, the left leg stretched slightly down to reveal the full redness of the posterior thigh.
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Anthony Etherin @anthonyetherin.bsky.social · 21/07/2026
WORD FACT The “minim” is a short vertical stroke used in handwriting. In Gothic scripts, many letters — such as m, n, and u — were made up of minims joined by fine connecting strokes. As a result, words like minimum could appear as a confusing row of vertical lines. [1/3]
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Igor Adameyko @adameykolab.bsky.social · 18/07/2026
This pulsing orb is the advanced 1 mm larva of a sea angel ✨🌊🔬. Kattegat, The North Sea. Sea angels are my fav mollusks, and I’ve always been dreaming about seeing an advanced larva.
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Joschua Knüppe @joschuaknuppe.bsky.social · 13/07/2026
After returning from Lithuania I finally caught up with Surviving Earth today. The Carboniferous was my favorite episode so far and not just because I made concept art for the Arthropleura. Important: I made this BEFORE the head material was published.
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Jasmin LaBotaniste @labotaniste.bsky.social · 16/07/2026
Psst: if you take the capsules apart they look like small owls 🥰 so cute!
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Sue @cameratrapsue.bsky.social · 16/07/2026
And now for something completely different. 360 degree camera tiny planet view of the apparent movement of the stars. Polaris is in the center of the smallest circle on the left of video. The white lines are the star trails from 10pm to 4am. This is something I've wanted to do for a while.
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 12/07/2026
It’s fuckin’ moth night
A toad looks grumpily at you
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Jasmin LaBotaniste @labotaniste.bsky.social · 08/07/2026
Where the wildflowers grow 💐 #wildflowers #Pyrenees
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Sajad Alipour @sajadalipour98.bsky.social · 08/07/2026
Crocus dolatyarii Rukšāns Iridaceae West Azerbaijan, Iran 25th June 2026 Elevation 2800m #Crocus #Iridaceae #wildflower
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Jasmin LaBotaniste @labotaniste.bsky.social · 04/07/2026
A flower very close to my heart: Linnaea borealis. #wildflowers #botany #Alps
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Prof. Ian Walker @ianwalker.bsky.social · 01/07/2026
Map nerds have probably heard of Baarle-Hertog and its bonkers borders, but I've just been looking at the map of that area and noticed that the Holy Roman wackiness extends well outside the town. Imagine being this Dutch farmer who can't harvest his wheat without invading Belgium
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Jasmin LaBotaniste @labotaniste.bsky.social · 29/06/2026
Saxifraga stellaris floating on a mossy cushion in a cristal clear mountain stream ☁️💫 #wildflowers #botany #Alps
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Jasmin LaBotaniste @labotaniste.bsky.social · 28/06/2026
A sea of green. Equisetum fluviatile #botany #fern #Alps
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Sajad Alipour @sajadalipour98.bsky.social · 28/06/2026
Puschkinia scilloides Blooming through the snow in the middle of summer. West Azerbaijan, Iran Yesterday Elevation 2350
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