Topics (384k) Articles (398k) Users (410) Discussions (242) Comments (383) Files (13k) New article
Locomotion using two limbs for support and propulsion. Occasional bipedal movement must be distinguished from habitual or obligate bipedal locomotion.
An upright orientation of the trunk. It is not synonymous with suspension, knuckle-walking or habitual terrestrial bipedalism.
Mechanical processing of food by repeated jaw and tooth movements. It changes food particle size and surface area before subsequent digestion.
The bony framework of the head. Comparisons must distinguish deformation after death from biological differences.
The skeletal structure connecting the hindlimb apparatus to the axial skeleton in the ancestral tetrapod arrangement. Reduction of this connection is informative in whale evolution.
The serial axial skeletal structure composed of vertebrae. Regional proportions and joint surfaces constrain locomotor reconstructions.
A flattened locomotor appendage specialized for movement in water. Similar functions have arisen in distinct vertebrate lineages.
Internal supporting skeletal structures. In paired appendages, the identities and articulations of elements provide stronger comparative information than the mere presence of mineralized tissue.
A pectoral or pelvic appendage belonging to a paired vertebrate system. Comparative organization connects fin and limb histories while allowing extensive specialization.
A small mineralized skeletal unit relevant to comparisons between dermal coverings and oral dentitions. Tissue composition and position must be treated as distinct characters.
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