The La Pedrera de Rúbies Formation is a geological formation located in the Spanish Pyrenees, specifically in the region of Catalonia. It is known for its rich fossil deposits, particularly those related to the Late Cretaceous period. The formation is primarily composed of sediments that have accumulated over millions of years and is notable for containing various types of fossils, including plants, invertebrates, and vertebrates, which provide insights into the ancient ecosystems that existed in that area.
A homophone is a word that is pronounced the same as another word but has a different meaning and often a different spelling. For example, "pair" (a set of two) and "pear" (a type of fruit) are homophones. They sound alike but refer to different things. Homophones can be a source of confusion in written language and are often used in puns and wordplay.
As of my last knowledge update in October 2023, "Magnext" could refer to various things, depending on the context. However, one notable reference is to a brand of magnetic building toys designed to encourage creativity and STEM learning among children. These toys typically consist of magnetic tiles or blocks that can be easily connected and rearranged to create different structures and shapes.
Marika Taylor is a name that could refer to different individuals or entities, but there is no widely recognized or prominent person or thing by that name in popular culture, science, or other fields as of my last knowledge update in October 2023.
Jan Ambjørn is a theoretical physicist known for his work in the field of quantum gravity, and in particular for his contributions to loop quantum gravity and causal set theory. His research often explores the connections between quantum mechanics and general relativity, and he has been involved in various aspects of understanding how spacetime might be represented at the quantum level.
The National Byway by Ciro Santilli 40 Updated 2025-07-16
It runs along quiet roads, rather than a mixture of roads and tracks like the National Cycle Network, making it more appropriate for road bikes.
TODO interactive online app? Ahh, those charities that try to make money by individual transactions... when they die, nothing will be left of all their work.
Edit: noticed that it is on by default on OpenStreetMaps web UI under the "Cycle Map" layer marked at "NB".
Ł by Ciro Santilli 40 Updated 2025-07-16
Video 1.
Exploring! the Special Letters of the Polish Alphabet: L by Polish Girl Next Door (2021)
Source.
The Twelve Apostles were actually officially appointed by Jesus amongst his followers. It was not simply that they were the first followers. It was official rank.
Gospel of Matthew 7:13:
Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.
Ciro Santilli really likes this one, because he feels that where many people go, it is useless to go again. It is much better to explore that which few can do, but which many will need.
Also known as being hipster.
tipitaka.fandom.com/wiki/Puggala-Pannatti-Chap.2:
He who stores up whatever he gets and he who gives away whatever he gets - these two persons are hard to satisfy.

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!
We have two killer features:
  1. 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-calculus
    Articles 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/derivative
  2. 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.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . 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.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
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