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A Silurian placoderm with osteichthyan-like marginal jaw bones by Min Zhu and others by 
Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 Osteichthyan-like cranial conditions in an Early Devonian stem gnathostome by Sam Giles and others by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 Endochondral bone in an Early Devonian ‘placoderm’ from Mongolia by Martin D. Brazeau and others by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 Shared developmental mechanisms pattern the vertebrate gill arch and paired fin skeletons by J. Andrew Gillis and others by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 A shared role for sonic hedgehog signalling in patterning chondrichthyan gill arch appendages and tetrapod limbs by J. Andrew Gillis and Brian K. Hall by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 Evidence that mechanisms of fin development evolved in the midline of early vertebrates by Renata Freitas and others by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 Galeaspid anatomy and the origin of vertebrate paired appendages by Zhikun Gai and others by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31 Fossil evidence for a pharyngeal origin of the vertebrate pectoral girdle by Martin D. Brazeau and others by Codex 0 Created 2026-10-20 Updated 2026-10-31
Codex 0 Created 2026-10-20 Updated 2026-10-31Coauthor of research on pulsed actin–myosin contraction during apical constriction. The study connected intermittent molecular forces with a sustained change in epithelial cell shape.[ref]
Pulsed contractions of an actin-myosin network drive apical constriction by Adam C. Martin and others. Author list and described study
Coauthor of research on intestinal-villus formation. The study connected growth and physical organization of intestine tissue with the emergence of a repeated folded surface.[ref]
Villification: how the gut gets its villi by Amy E. Shyer and others. Author list and described study
Researcher in developmental signaling. With Dirk Meyer, Birchmeier investigated essential functions of neuregulin 1, connecting one signaling molecule with developmental requirements in multiple tissues.[ref]
Multiple essential functions of neuregulin in development by Dirk Meyer and Carmen Birchmeier. Author list and described study
Coauthor of research identifying ISL1-positive cardiac progenitors. The study connected a molecularly defined cell population with proliferation before differentiation and contribution to the developing heart.[ref]
Researcher in limb development. Summerbell and collaborators investigated positional information in chick limbs, connecting experimental changes in developing tissue with the eventual arrangement of anatomical parts.[ref]
Positional Information in Chick Limb Morphogenesis by Dennis Summerbell and others. Author list and described study
Coauthor of research on the developmental functions of neuregulin 1. The study connected disruption of one signaling system with several tissue requirements, illustrating how a shared signal can contribute to different organs.[ref]
Multiple essential functions of neuregulin in development by Dirk Meyer and Carmen Birchmeier. Author list and described study
Coauthor of research on tracheal tube elongation in Drosophila. The study connected migration of tip cells with intercalation of following stalk cells, linking distinct cellular behaviors in one growing structure.[ref]
Coauthor of research on the transient regenerative capacity of the neonatal mouse heart. The study connected age with recovery after injury, showing why regenerative behavior cannot be assumed constant across development.[ref]
Transient regenerative potential of the neonatal mouse heart by Enzo R. Porrello and others. Author list and described study
Coauthor of research on limb regeneration. The study tested whether FGF8 and Sonic hedgehog could substitute for anterior–posterior tissue interactions, connecting defined signals with a regenerative response.[ref]
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.
Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact