Roberta Ragazzini

A color outdoor portrait of American bacterial geneticist Evelyn Witkin in her later years, standing in a sun-dappled garden or courtyard setting with green foliage and a brick building in the soft-focus background. She is an elderly woman with fair skin, short wavy white hair, gentle smile lines, and warm, thoughtful eyes gazing directly at the camera with a kind, serene expression. She wears a white button-up blouse with subtle textured patterns, small earrings, and a distinctive beaded necklace featuring dark and light beads. A small silver dragonfly brooch is pinned to the left side of her blouse, symbolizing her pioneering work on DNA damage repair (often likened to cellular "rescue" mechanisms). The natural daylight softly illuminates her face, highlighting her dignified and approachable presence as a trailblazing scientist and a Lasker Award and National Medal of Science recipient. The overall mood is one of quiet wisdom, resilience, and quiet celebration of a long, impactful career in #WomenInScience. #WomensHistoryMonth

Geneticist Evelyn Witkin (b. #OTD 1921) pioneered work on DNA damage repair & mutagenesis.

Her discovery of the SOS response revealed how cells actively respond to genetic threats, laying foundations for insights into cancer, aging, radiation effects & chemotherapy resistance. #WomenInSTEM #WHM

An exciting journey through thymus biology and thymic stem cells. Enjoy 😉 Thanks for this opportunity @bonfantilab.bsky.social

Gonadotrophs have a dual origin, with most derived from early postnatal pituitary stem cells - Nature Communications Pituitary gonadotrophs secrete LH and FSH, regulating gonadal function. Here authors show that in the mouse pituitary most gonadotrophs originate from postnatal stem cells, while a minor population of...

My post doc position ad is out, please circulate!
We want to understand why mouse gonadotrophs have a dual origin. Follow-up of this work: www.nature.com/articles/s41....

The job link is here: qmul-jobs.tal.net/vx/mobile-0/...

Fluorescence microscopy image of an ovarian follicle (light blue/magenta), with a bright central oocyte.

💥🥚 ANR-funded Assistant Engineer position open in our “Control & Dynamics of the Ovarian Cycle” group at IBDM Marseille 🇫🇷

Work on mouse lines + lab logistics + follicle culture/imaging 🔬

🗓️ Apply by 26 Jan: emploi.cnrs.fr/Offres/CDD/U...

Please share widely — especially with colleagues in France!

Two great PhD opportunities. Few days left to apply. 🍀🍀

The Francis Crick Institute PhD programme recruitment is now live and our lab is recruiting. If you are interested in studying the role of the extracellular matrix in tissue dynamics during development and cancer please apply – link below. Please share. www.crick.ac.uk/careers-stud...

Very sad news, John Gurdon has died.

A developmental biologist's developmental biologist, Nobel prize winner

His work is the foundation of much of today's dev & stem cell bio.

An inspiration to many, including me. Always asking questions & wanting the answers

www.magd.cam.ac.uk/news/profess...

This is a disaster if the EU doesn't follow up by doubling the budget 😬🧪

Massive congrats Juliane ! You are a star 🤩

Amazing news and look forward to the exciting research ahead! 🍀🤩🍀🤩⚡️many congrats to @charleneboumendil.bsky.social

Welcome Edith Heard Today, Edith Heard begins her tenure as Chief Executive Officer of the Francis Crick Institute

Today, Edith Heard begins her tenure as our new Chief Executive Officer. Edith joins us from @embl.org, and will head up the new Developmental Epigenetics Laboratory alongside her executive role.

www.crick.ac.uk/news/2025-09...

This is amazing 🤩

Reforming how research and researchers are assessed is an essential step toward ensuring a more accurate, fair, and meaningful evaluation of scientific work.

A recent pan-EMBL event provided an opportunity to reflect on this key topic.

Learn more: www.embl.org/news/lab-mat...

Thymic size decreases with age, but the factors driving thymic regression in later life had been ill-defined.

M. Paula Longhi & team now find smoking and sex differences contribute to thymopoietic activity in individuals aged 50 and older.

Full report: buff.ly/To6Qikz

Congrats Sergio ! That’s amazing 🤩

Very impressed by the work of my future colleague about nuclear pore mechanisms maintaining global chromatin architecture. Great story, have a look.

Pleased to share my new review:

Ovulation: A cellular symphony in three movements 💥🥚

Ovulation is more than egg release—it's a tightly regulated, tissue-scale process. Here, I present a temporal framework structured as a symphony performed by the cells of the follicle.

🔗 doi.org/10.1016/j.se...

Looking forward to reading it 🤩

If you don’t have time to take a walk, then you don’t have time to do science. Charles Darwin would take two walks every day on his "thinking path", not as a break from science, but as a crucial part of it.

All the best to Juliane, highly recommended ! 🍀🍀

An amazing line of speakers 🔥🔥🔥highly recommended!

On #WorldEnvironmentDay, we join the call to #BeatPlasticPollution 🌍

Plastic pollution isn't just harming our planet — it's affecting our health too.

💚 Say NO to plastic bags
❌ Never microwave plastic
💧 Choose refillables over disposables

#BecauseHormonesMatter

We are recruiting at @igmm-montpel.bsky.social

Join us in a dynamic scientific environment in beautiful and sunny Montpellier 👩‍🔬👨‍🔬☀️

For questions, feel free to write to search2025@igmm.cnrs.fr or DM me!

This research was led by Daniel Sheridan with co-senior authors Robin Lovell-Badge and @krizzot.bsky.social.

We are happy to announce student and postdoc speakers. Thanks to all who submitted an abstract!
#yen2025

173 years ago, Santiago Ramón y Cajal was born. Doctor, scientist, Nobel Prize winner, and father of modern #neuroscience. His work still lights the way for science lovers everywhere.

#SantiagoRamónyCajal

📸 Credit: Instituto Cajal (CSIC), Madrid.

🧪

I just learned that I was promoted to Professor -- with these little ones by my side the whole way (I started at URI when our oldest was 12 weeks old). Sharing as a reminder that parenting and academia can coexist.

On This Day in 2023 Bivalent Prefusion F Vaccine in Pregnancy to Prevent RSV Illness in Infants A pregnant woman with a baby in her arms stands next to a box about the prevention of RV-associated respiratory infections in infants.

On this day 2 years ago, the MATISSE study showed the safety and efficacy of the RSV vaccine during pregnancy. This and a similar newborn vaccine can prevent infant RSV disease. Revisit the study: nej.md/3Mc1hmg 1/3

#MedSky #IDSky #OBGYN

Hi! Here is a PhD opportunity at Montpellier, IGH institute with Séverine Chambeyron to study endogenous retroviruses ! #TEsky #PhD

'Emergence and properties of adult mammalian epidermal stem cells'
www.sciencedirect.com/science/arti...