April fool? Published on March 26, 2024March 26, 2024 by fivecolorssandt@icloud.com Camouflaged truth It’s not always easy to sort out fact from falsehood. Read More
time and tide Published on March 19, 2024March 17, 2024 by fivecolorssandt@icloud.com Teaching complexity Almost every subject is complicated if you go deeply enough into it. Where do you stop teaching? Read More
The prudent mariner Published on February 13, 2024February 12, 2024 by fivecolorssandt@icloud.com The ways of the sea Our navigator realizes that there’s always more to learn. Read More
History and the ship Published on July 18, 2023July 16, 2023 by fivecolorssandt@icloud.com Combining many things We present another way to teach history. Read More
Fresh-ground Published on April 26, 2022April 25, 2022 by fivecolorssandt@icloud.com Far and near Technology and economics, fruit and spices, and a nutmeg-grater. Read More
Twelve quarters Published on March 30, 2021March 28, 2021 by fivecolorssandt@icloud.com Where the wind blows A poetic phrase has an unexpected scientific source. Read More
The long hours Published on March 16, 2021March 15, 2021 by fivecolorssandt@icloud.com Time of the season Some hours used to be longer than others. Really. Read More
Starting from here Published on October 20, 2020October 19, 2020 by fivecolorssandt@icloud.com Using a simplistic idea We consider a way to use something so simplified that it’s wrong. Read More
Archives and old software Published on April 14, 2020April 13, 2020 by fivecolorssandt@icloud.com Looking again We find ourselves agreeing with Antoine de Saint-Exupéry. Read More
Making a drawing (II) Published on April 2, 2019April 2, 2019 by fivecolorssandt@icloud.com When the details are important Sometimes careful pencil-work is vital. Read More