John Sebastian
@johnseb.bsky.social
Fluid Mechanics, etc
https://john-seb.github.io/
https://john-seb.github.io/
Reposted by John Sebastian
New paper!💡 Amir Ohad developed this nifty setup to measure weak forces generated by freely moving plants, based on the deflection of a pendulum (straw from the cafeteria 😎), which does not require any tethering of the plant: academic.oup.com/jxb/advance-...
Plant-obstacle interactions here we come!
Plant-obstacle interactions here we come!
November 2, 2025 at 7:34 AM
New paper!💡 Amir Ohad developed this nifty setup to measure weak forces generated by freely moving plants, based on the deflection of a pendulum (straw from the cafeteria 😎), which does not require any tethering of the plant: academic.oup.com/jxb/advance-...
Plant-obstacle interactions here we come!
Plant-obstacle interactions here we come!
Reposted by John Sebastian
“Cellular Olympics” our catalog of freeky ultra fast cellular superhero’s is freely available “Ann Rev of microbiology”
www.annualreviews.org/content/jour...
This is a compilation of world’s fastest single cell organisms - enjoy this buffet of rare delightful protists with mind bending speeds. 🧪
www.annualreviews.org/content/jour...
This is a compilation of world’s fastest single cell organisms - enjoy this buffet of rare delightful protists with mind bending speeds. 🧪
October 24, 2025 at 10:57 AM
“Cellular Olympics” our catalog of freeky ultra fast cellular superhero’s is freely available “Ann Rev of microbiology”
www.annualreviews.org/content/jour...
This is a compilation of world’s fastest single cell organisms - enjoy this buffet of rare delightful protists with mind bending speeds. 🧪
www.annualreviews.org/content/jour...
This is a compilation of world’s fastest single cell organisms - enjoy this buffet of rare delightful protists with mind bending speeds. 🧪
Reposted by John Sebastian
An intimate conversation about what drives me every day in “sharing experience” of science by getting tools of science in hands of kids everywhere.
themicroscopists.bitesizebio.com/episodes/man...
themicroscopists.bitesizebio.com/episodes/man...
October 31, 2025 at 12:30 PM
An intimate conversation about what drives me every day in “sharing experience” of science by getting tools of science in hands of kids everywhere.
themicroscopists.bitesizebio.com/episodes/man...
themicroscopists.bitesizebio.com/episodes/man...
Reposted by John Sebastian
Congrats @laurentformery.bsky.social
Often people ask why we chose to work on a certain problems and a simple answer for us in this case - it’s beautiful. If you want to learn the magic of building crystalline « gems » inside the body - see our latest paper at www.biorxiv.org/content/10.1...
Often people ask why we chose to work on a certain problems and a simple answer for us in this case - it’s beautiful. If you want to learn the magic of building crystalline « gems » inside the body - see our latest paper at www.biorxiv.org/content/10.1...
October 18, 2025 at 8:18 PM
Congrats @laurentformery.bsky.social
Often people ask why we chose to work on a certain problems and a simple answer for us in this case - it’s beautiful. If you want to learn the magic of building crystalline « gems » inside the body - see our latest paper at www.biorxiv.org/content/10.1...
Often people ask why we chose to work on a certain problems and a simple answer for us in this case - it’s beautiful. If you want to learn the magic of building crystalline « gems » inside the body - see our latest paper at www.biorxiv.org/content/10.1...
Reposted by John Sebastian
Sharpen your knives! High-speed video analysis reveals that blunt knives and faster cutting speeds release more eye-irritating droplets from onions by building pressure under the onion’s skin before the ejection of the tear-inducing aerosols. In PNAS: https://ow.ly/5rc750Xcvhj
October 16, 2025 at 11:00 PM
Sharpen your knives! High-speed video analysis reveals that blunt knives and faster cutting speeds release more eye-irritating droplets from onions by building pressure under the onion’s skin before the ejection of the tear-inducing aerosols. In PNAS: https://ow.ly/5rc750Xcvhj
Reposted by John Sebastian
One day in the lab, we accidentally discovered that the spines of a cactus 🌵 straighten when exposed to fog. I was intrigued and so were my collaborators. How does this work and what can be gained from it? Here are some of the answers in our new preprint:
doi.org/10.1101/2025...
doi.org/10.1101/2025...
October 8, 2025 at 3:25 PM
One day in the lab, we accidentally discovered that the spines of a cactus 🌵 straighten when exposed to fog. I was intrigued and so were my collaborators. How does this work and what can be gained from it? Here are some of the answers in our new preprint:
doi.org/10.1101/2025...
doi.org/10.1101/2025...
Reposted by John Sebastian
Our new study from Joanne Steiner’s PhD work and with C. Morize, P. Gondret, and I. Delbende has just been published in Phys. Rev. Fluids! We study vortex rings generated when a disk moves toward or away from a wall. doi.org/10.1103/ynxr...
August 14, 2025 at 1:47 PM
Our new study from Joanne Steiner’s PhD work and with C. Morize, P. Gondret, and I. Delbende has just been published in Phys. Rev. Fluids! We study vortex rings generated when a disk moves toward or away from a wall. doi.org/10.1103/ynxr...
Reposted by John Sebastian
What a great discovery and story!!
I am proud and grateful to present a dream project today in @nature.com www.nature.com/articles/s41...
Meet #Mirasaura grauvogeli, a #wonderreptilewith skin appendages that rival feathers and hairs, challenging our view of reptile #evolution🪶🦎
Meet #Mirasaura grauvogeli, a #wonderreptilewith skin appendages that rival feathers and hairs, challenging our view of reptile #evolution🪶🦎
July 23, 2025 at 7:12 PM
What a great discovery and story!!
Reposted by John Sebastian
🚨Don’t miss out! Last weeks left to register for the Plant Computational Biology Workshop 2025, sponsored by @cambup-lifesci.cambridge.org 🌱
📆Deadline 31 July - www.slcu.cam.ac.uk/computationa...
#ComputationalBiology #PlantSci
📆Deadline 31 July - www.slcu.cam.ac.uk/computationa...
#ComputationalBiology #PlantSci
July 23, 2025 at 8:14 AM
🚨Don’t miss out! Last weeks left to register for the Plant Computational Biology Workshop 2025, sponsored by @cambup-lifesci.cambridge.org 🌱
📆Deadline 31 July - www.slcu.cam.ac.uk/computationa...
#ComputationalBiology #PlantSci
📆Deadline 31 July - www.slcu.cam.ac.uk/computationa...
#ComputationalBiology #PlantSci
Reposted by John Sebastian
Inverted Wolfram Alpha logo spotted at St. Mark's basilica in Venice
July 20, 2025 at 9:55 AM
Inverted Wolfram Alpha logo spotted at St. Mark's basilica in Venice
Reposted by John Sebastian
If you're interested in any combination of elasticity, surface tension and biology, please check out the latest issue of Interface Focus on "Capillarity and Elastocapillarity in Biology": royalsocietypublishing.org/toc/rsfs/202...
@royalsocietypublishing.org
@royalsocietypublishing.org
Interface Focus: Vol 15, No 2
royalsocietypublishing.org
May 16, 2025 at 5:31 PM
If you're interested in any combination of elasticity, surface tension and biology, please check out the latest issue of Interface Focus on "Capillarity and Elastocapillarity in Biology": royalsocietypublishing.org/toc/rsfs/202...
@royalsocietypublishing.org
@royalsocietypublishing.org
Reposted by John Sebastian
Help us record firefly flashes! 👇🙏
Do you have fireflies in your backyard? Biologist @oritpeleg.bsky.social is collecting data! #emergence docs.google.com/forms/d/e/1F...
Help us Record Firefly Flashes ✨
Firefly flashes are amazing ❤️ During mating season, fireflies gather in groups and flash their species-specific flash pattern. To better understand these communication signals, we developed a method ...
docs.google.com
June 25, 2025 at 9:32 PM
Help us record firefly flashes! 👇🙏
Reposted by John Sebastian
Excited to share our new work in @science.org #Robotics that shows how reversible kinks can help nematodes perform jumps 1000 times faster than you can blink! scim.ag/4iDIa1i
🧵:
Work co-led by @chemicalsunnyraj.bsky.social , @itiwari93.bsky.social and Victor Ortega-Jimenez with many other colleagues
🧵:
Work co-led by @chemicalsunnyraj.bsky.social , @itiwari93.bsky.social and Victor Ortega-Jimenez with many other colleagues
Reversible kink instability drives ultrafast jumping in nematodes and soft robots
A soft jumping robot inspired by nematodes demonstrates ultrafast jumping using reversible kink instability and stiffness.
scim.ag
April 24, 2025 at 4:29 AM
Excited to share our new work in @science.org #Robotics that shows how reversible kinks can help nematodes perform jumps 1000 times faster than you can blink! scim.ag/4iDIa1i
🧵:
Work co-led by @chemicalsunnyraj.bsky.social , @itiwari93.bsky.social and Victor Ortega-Jimenez with many other colleagues
🧵:
Work co-led by @chemicalsunnyraj.bsky.social , @itiwari93.bsky.social and Victor Ortega-Jimenez with many other colleagues
Reposted by John Sebastian
Join us this Fall at ICTS for an advanced course on Geometry, Mechanics & the Physics of Growth: www.icts.res.in/program/Geom... Co-organized with S. Ganga Prasath & @surajshankar.bsky.social
April 16, 2025 at 8:48 AM
Join us this Fall at ICTS for an advanced course on Geometry, Mechanics & the Physics of Growth: www.icts.res.in/program/Geom... Co-organized with S. Ganga Prasath & @surajshankar.bsky.social
Reposted by John Sebastian
5/ Read more :
🔗 Popular science article FR : www.espci.psl.eu/fr/actualite...
🔗 Full publication in PNAS: www.pnas.org/doi/10.1073/...
🔗 Popular science article FR : www.espci.psl.eu/fr/actualite...
🔗 Full publication in PNAS: www.pnas.org/doi/10.1073/...
On the shape of air bubbles trapped in ice | PNAS
Water usually contains dissolved gases, and because freezing is a purifying process
these gases must be expelled for ice to form. Bubbles appear at...
www.pnas.org
March 27, 2025 at 3:01 PM
5/ Read more :
🔗 Popular science article FR : www.espci.psl.eu/fr/actualite...
🔗 Full publication in PNAS: www.pnas.org/doi/10.1073/...
🔗 Popular science article FR : www.espci.psl.eu/fr/actualite...
🔗 Full publication in PNAS: www.pnas.org/doi/10.1073/...
Reposted by John Sebastian
A new article with @sreeramr.bsky.social is out in JCIS! We study the dynamics of droplets of fiber suspensions impacting surfaces, a topic important for coating processes and additive manufacturing, among others doi.org/10.1016/j.jc... @univofmaryland.bsky.social @ucsbengineering.bsky.social
April 9, 2025 at 1:06 AM
A new article with @sreeramr.bsky.social is out in JCIS! We study the dynamics of droplets of fiber suspensions impacting surfaces, a topic important for coating processes and additive manufacturing, among others doi.org/10.1016/j.jc... @univofmaryland.bsky.social @ucsbengineering.bsky.social
Reposted by John Sebastian
Join us! 🌺
Join us in Cambridge this September for the 9th annual Plant #ComputationalBiology Workshop.
Seminars and discussions will focus on 5 key themes:
1. #Mechanics
2. Pattern processes
3. #AI
4. Computer graphics
5. Concepts
🧳3 travel grants available
REGISTER TODAY www.slcu.cam.ac.uk/computationa...
Seminars and discussions will focus on 5 key themes:
1. #Mechanics
2. Pattern processes
3. #AI
4. Computer graphics
5. Concepts
🧳3 travel grants available
REGISTER TODAY www.slcu.cam.ac.uk/computationa...
April 10, 2025 at 10:23 AM
Join us! 🌺
Reposted by John Sebastian
Advertisement for an advanced course in Udine, Italy 🇮🇹 this summer ☀️. Learn about mechanics for the fabrication and programming of soft robots 🦑. cism.it/en/activities/…
organized along with @joelmarthelot.bsky.social
organized along with @joelmarthelot.bsky.social
February 22, 2025 at 9:47 AM
Advertisement for an advanced course in Udine, Italy 🇮🇹 this summer ☀️. Learn about mechanics for the fabrication and programming of soft robots 🦑. cism.it/en/activities/…
organized along with @joelmarthelot.bsky.social
organized along with @joelmarthelot.bsky.social
Reposted by John Sebastian
The Gallery of Soft Matter 2025 @apsdsoft.bsky.social has some amazing entries this year. Check them out here: engage.aps.org/dsoft/galler....
Make sure to vote! Not sure about the deadline, but there’s a QR code at the DSOFT table with all the details.
Make sure to vote! Not sure about the deadline, but there’s a QR code at the DSOFT table with all the details.
March 18, 2025 at 4:58 PM
The Gallery of Soft Matter 2025 @apsdsoft.bsky.social has some amazing entries this year. Check them out here: engage.aps.org/dsoft/galler....
Make sure to vote! Not sure about the deadline, but there’s a QR code at the DSOFT table with all the details.
Make sure to vote! Not sure about the deadline, but there’s a QR code at the DSOFT table with all the details.
Reposted by John Sebastian
Lineup from our group at the @APS Global Summit: We will be covering studies on fluids, grains, drops, and suspensions! More details below.
March 16, 2025 at 12:43 AM
Lineup from our group at the @APS Global Summit: We will be covering studies on fluids, grains, drops, and suspensions! More details below.
Reposted by John Sebastian
…because one inspired person can make remarkable discoveries that a thousand others might not see right in front of them.”
www.cell.com/news-do/50-i...
Happy holidays! Share the joy of science this holiday season.
www.cell.com/news-do/50-i...
Happy holidays! Share the joy of science this holiday season.
Bioengineer and cell biologist Manu Prakash on embracing and sharing the joy of science
The importance of studying nature in its true “playground” and more from Dr. Prakash.
www.cell.com
December 21, 2024 at 6:10 AM
…because one inspired person can make remarkable discoveries that a thousand others might not see right in front of them.”
www.cell.com/news-do/50-i...
Happy holidays! Share the joy of science this holiday season.
www.cell.com/news-do/50-i...
Happy holidays! Share the joy of science this holiday season.
Reposted by John Sebastian
This happens thanks to a rapid increase in the insect’s blood pressure. We measured it: the pressure builds up, reaches a plateau, and the wings deploy!
December 11, 2024 at 2:00 PM
This happens thanks to a rapid increase in the insect’s blood pressure. We measured it: the pressure builds up, reaches a plateau, and the wings deploy!
Discussing this work (@ Journal Club) already this Friday!
Hot off the press
A super fun collaboration and paper. All you ever wanted about the squirting cucumber but never dared to ask.
www.pnas.org/doi/10.1073/...
A super fun collaboration and paper. All you ever wanted about the squirting cucumber but never dared to ask.
www.pnas.org/doi/10.1073/...
Uncovering the mechanical secrets of the squirting cucumber | PNAS
Rapid movement is rare in the plant kingdom, but a prerequisite for ballistic seed
dispersal. A particularly dramatic example of rapid motion in pl...
www.pnas.org
November 27, 2024 at 10:28 PM
Discussing this work (@ Journal Club) already this Friday!