14 Matching Annotations
  1. Dec 2023
    1. How to fold and cut a Christmas star<br /> Christian Lawson-Perfect https://www.youtube.com/watch?v=S90WPkgxvas

      What a great simple example with some interesting complexity.

      For teachers trying this with students, when one is done making some five pointed stars, the next questions a curious mathematician might ask are: how might I generalize this new knowledge to make a 6 pointed star? A 7 pointed star? a 1,729 pointed star? Is there a maximum number of points possible? Is there a minimum? Can any star be made without a cut? What happens if we make more than one cut? Are there certain numbers for which a star can't be made? Is there a relationship between the number of folds made and the number of points? What does all this have to do with our basic definition of what a paper star might look like? What other questions might we ask to extend this little idea of cutting paper stars?

      Recalling some results from my third grade origami days, based on the thickness of most standard office paper, a typical sheet of paper can only be folded in half at most 7 times. This number can go up a bit if the thickness of the paper is reduced, but having a maximum number of potential folds suggests there is an upper bound for how many points a star might have using this method of construction.

  2. Nov 2023
  3. Jun 2023
  4. May 2023
  5. Feb 2023
    1. As in any science class, you learn how tointerpret and apply what you observe. Elders refer to this process as “reading the stars.”

      This idea is closely related to "talking rocks" and seems a very apt parallel.

  6. Oct 2022
    1. A historical perspective on the sciencesbrings into view controversies, and some beliefs and methodological con-victions that retrospectively turn out to be false—among Blumenberg’scharacteristically colorful picks are Augustine writing that “the stars werecreated for the consolation of people obliged to be active at night,” and“Linnaeus’s opinion that the song of the birds at the first light of morningwas instituted as consolation for the insomnia of the old.”84

      something poetic about these examples even if they're poor science...

  7. Aug 2022
  8. Mar 2022
    1. https://www.youtube.com/watch?v=kkjf0hCKOCE

      The sky is a textbook. The sky is a lawbook. The sky is a science book. —Duane Hamacher, (1:24)

      Hamacher uses the Western description "method of loci" rather than an Indigenous word or translated word.


      The words "myth", "legend", "magic", "ritual", and "religion" in both colloquial English and even anthropology are highly loaded terms.

      Words like "narrative" and "story" are better used instead for describing portions of the Indigenous cultures which we have long ignored and written off for their seeming simplicity.

  9. Jan 2022
    1. You don't absorb the ideas of John Dewey the way you absorb the crooning of Mr. Vallee.

      Interesting juxtaposition of the height of academia and pop stardom of his day.

      John Dewey (/ˈduːi/; October 20, 1859 – June 1, 1952) was an American philosopher, psychologist, and educational reformer whose ideas have been influential in education and social reform. He was one of the most prominent American scholars in the first half of the twentieth century. #

      Hubert Prior Vallée (July 28, 1901[1] – July 3, 1986), known professionally as Rudy Vallée, was an American singer, musician, actor, and radio host. He was one of the first modern pop stars of the teen idol type. #

  10. Dec 2021
  11. Nov 2021
    1. And it's this process, the gravitational dance of 100,000 galaxies swirling together, 00:05:25 which drive the process of galaxies colliding, which drive massive star formation, which drive the process of creating the iron that courses through each one of our veins with every heartbeat.

      For a deeper explanation outside of the TED Talk format, it would be enlightening to unpack a bit of the science behind how astronomers come to these conclusions.

  12. Oct 2017
    1. Astronomers have now seen and heard a pair of dead stars collide, giving them the first glimpse of what they call a “cosmic forge,” where the world’s jewels were minted billions of years ago.

      Super cool!

  13. Nov 2015
    1. Pipes turn out to be documents.

      This just blew my mind. Reminds me of this scene in The Fault in Our Stars when Hazel is wearing a shirt with a pipe on it and tries to argue with someone that its not actually a pipe... it's only a drawing of a pipe..