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Jan-Maarten

@jan-maarten.bsky.social

Bio-entertainment

55 Followers  |  78 Following  |  62 Posts  |  Joined: 28.07.2023  |  1.8734

Latest posts by jan-maarten.bsky.social on Bluesky

Red dot

Red dot

Ik heb gestemd, voor een duurzame, rechtvaardige samenleving

29.10.2025 14:14 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Weather stations up & running! The Smart Citizen kit (open source), an Ecowitt station, and 3 different Nutshell eDNA samplers for testing

13.10.2025 14:04 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Borstwervel van een zoogdier (want articulatievlak voor rib), lijkt me wat groot voor een zeehond. Geen expert, maar ik denk aan dolfijn of schaap.

11.10.2025 15:09 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Korean perilla seedling with triple whorls instead of double ones. Happy little monster

Korean perilla seedling with triple whorls instead of double ones. Happy little monster

@atinygreencell.bsky.social , turns out I am growing a Korean perilla (Perilla frutescens) that is doing a consistent triple whorl, spontaneously. Happy to ship a sample, once shipping between our countries is a go again

01.10.2025 13:20 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Metallic green bluebottle fly perched on the edge of a leaf. Hair metal.

Metallic green bluebottle fly perched on the edge of a leaf. Hair metal.

Stone bumblebee feeding on borage. It is hanging upside down from the blue-pink flower, which is pointed downwards

Stone bumblebee feeding on borage. It is hanging upside down from the blue-pink flower, which is pointed downwards

Aasvlieg en steenhommel-komkommerkruid brunch. Green bluebottle fly and stone bumblebee feeding on borage.

31.08.2025 18:01 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Close up of a spider in a slightly tattered web, drinking from their juice box

Close up of a spider in a slightly tattered web, drinking from their juice box

Close up of a fly on a leaf seen from the side. Big brown-red eye and pearly wings. Alert but still.

Close up of a fly on a leaf seen from the side. Big brown-red eye and pearly wings. Alert but still.

Fly on a flower bud in close up. The background is all blurry bc the zoom lens you need to get this close.

Fly on a flower bud in close up. The background is all blurry bc the zoom lens you need to get this close.

Nothing but some critters goin about their business

30.08.2025 16:38 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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DNAir sampler works in simulation too! Downward vertical air movement is color coded red. github.com/J4n-M44rt3n/...

20.08.2025 10:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Trees in the dunes, looking like shadowplay figures

Trees in the dunes, looking like shadowplay figures

Trees in the dunes, looking like shadowplay figures

Trees in the dunes, looking like shadowplay figures

Trees in the dunes, looking like shadowplay figures

Trees in the dunes, looking like shadowplay figures

Meijendel hike

19.08.2025 20:35 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Walking towards the launch of a new strandbeest, at a sunny slightly windy day at Scheveningen beach. Lots of people arounf, all taking photos with their phones

Walking towards the launch of a new strandbeest, at a sunny slightly windy day at Scheveningen beach. Lots of people arounf, all taking photos with their phones

Theo Janssen in a dark purple shirt and a tan cowboy-type hat guiding his strandbeest, with people, beach, and sea in the background

Theo Janssen in a dark purple shirt and a tan cowboy-type hat guiding his strandbeest, with people, beach, and sea in the background

Close up of the strandbeast sails with blue sky in the background. The light plays beautifully in the white sails

Close up of the strandbeast sails with blue sky in the background. The light plays beautifully in the white sails

Ongoing strandbeest launch as seen from the dunes. It all seems so small from afar

Ongoing strandbeest launch as seen from the dunes. It all seems so small from afar

Sarah and I went to see the launch of this year's strandbeest, at Scheveningen beach

19.08.2025 20:32 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Two small plant incubators in a windowsill, uv leds give a purple glow to the surroundings

Two small plant incubators in a windowsill, uv leds give a purple glow to the surroundings

Purple glow on a windowsill, I outfitted plant hatchery boxes with led strips today

04.08.2025 20:26 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Windtunnel on shelf, vacuum cleaner motor mounted with zipties on 3D printed pedestal, fan in large pvc tube (30 cm diameter)

Windtunnel on shelf, vacuum cleaner motor mounted with zipties on 3D printed pedestal, fan in large pvc tube (30 cm diameter)

Windtunnel, view from the other end, fan in the distance

Windtunnel, view from the other end, fan in the distance

Testing a new windtunnel build; vacuum cleaner universal motor, custom fan, zipties. Up to 4 m/s and counting.

28.07.2025 20:19 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Bumlebee on lavender, even closer but shakier too

27.07.2025 20:28 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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More bumblebee on lavender

27.07.2025 20:28 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Bumblebee on lavender

27.07.2025 20:27 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Spider-like, hand built Balinese fishing vessels out on the ocean on a bright, slightly cloudy day

Spider-like, hand built Balinese fishing vessels out on the ocean on a bright, slightly cloudy day

Spider-like, hand built Balinese fishing vessels out on the ocean on a bright, slightly cloudy day

Spider-like, hand built Balinese fishing vessels out on the ocean on a bright, slightly cloudy day

Spider-like, hand built Balinese fishing vessels out on the ocean on a bright, slightly cloudy day

Spider-like, hand built Balinese fishing vessels out on the ocean on a bright, slightly cloudy day

Squid fishin' fleet, Les, Bali

05.07.2025 03:35 β€” πŸ‘ 0    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Een Seek thermal compact pro voor je smartphone met zelfgemaakte toevoegingen om macro opnames te kunnen maken

01.07.2025 13:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

#ElkeDagEenInsect

01.07.2025 07:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Rhinoceros beetle on our porch last night

30.06.2025 14:12 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
Aardhommel op gele lis

Aardhommel op gele lis

Boomhommel op leeuwenbek

Boomhommel op leeuwenbek

Johanneskever op gele lis

Johanneskever op gele lis

Gele lis met kleine vriendjes

Gele lis met kleine vriendjes

Aardhommel, boomhommel, rozenkever, gele lis met kleine vriendjes

04.06.2025 18:09 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Foraging bumble bee, look at those flight muscles!

26.05.2025 20:24 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Also, it is a celebration of science as an everyday practice as opposed to a rarefied academic exercise; you too can go out, study, and support the kaleidoscope of life in your neighborhood. I enjoyed this book a lot, maybe you will too!

09.05.2025 09:19 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Book cover of Menno Schilthuizen's 'the urban naturalist'. It shows stylized, colorful outlies of urban plants and animals and the tools to study them.

Book cover of Menno Schilthuizen's 'the urban naturalist'. It shows stylized, colorful outlies of urban plants and animals and the tools to study them.

Does nature observe city limits? Why no, it does not. Menno SchilthuizenΒ΄s Β΄the urban naturalistΒ΄ is full of fascinating stories of life adapting to the urban environment and the people studying it.

09.05.2025 09:19 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Have they not been keeping up with the news?

17.02.2025 15:58 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Nah, that was the guzzly, vodka was involved

15.02.2025 22:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Shouldn't the hero first, like, fight a grizzly bare handed or such?

15.02.2025 21:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Electroplating setup, blue liquid in a plastic box with electrical contacts hung in them. An example of an electroplated ring is hold up in front of the camera.

Electroplating setup, blue liquid in a plastic box with electrical contacts hung in them. An example of an electroplated ring is hold up in front of the camera.

3D printed design for the frame for an ion-plasma wind tunnel. Looks a bit retro sci-fi, with three concentric funnels connected to a short open cylinder.

3D printed design for the frame for an ion-plasma wind tunnel. Looks a bit retro sci-fi, with three concentric funnels connected to a short open cylinder.

Second electroplating experiment, for an anode for what will be an ion-plasma wind tunnel. Electroplating is fun and easy, I can live with that!

11.02.2025 18:23 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Action to address climate crisis is CRITICAL! Definitely a great step towards getting different institutional leadership to work in unison!

18.11.2024 17:43 β€” πŸ‘ 1    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
Stylized purple octopus with safety goggles, this is the logo of Hackuarium Biolab in Ecublens Switzerland

Stylized purple octopus with safety goggles, this is the logo of Hackuarium Biolab in Ecublens Switzerland

Bio comunity lab extraordinaire Hackuarium celebrates their 10th anniversary this weekend! Join on video here -> epfl.zoom.us/j/61330371040 ; Program here -> wiki.hackuarium.ch/images/9/9e/...

12.10.2024 10:43 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Slime mold Andi: the first non-human organism genetically modified to its own specifications I. Recap: how to talk with a slime mold

Slime mold Andi, ambassador for the slime realm slime-mold-andi.medium.com/slime-mold-a...

11.09.2024 15:02 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
NASA Astronaut Don Pettit Soyuz MS-26 Launch
YouTube video by NASA NASA Astronaut Don Pettit Soyuz MS-26 Launch

In about fifteen minutes, slime mold Andi will be heading for the International Space Station, invited by NASA astronaut Don Pettit. Such an adventure! You can follow the launch here: www.youtube.com/watch?v=c59N...

11.09.2024 15:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

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