Talking like a sailor Published on April 1, 2025March 30, 2025 by fivecolorssandt@icloud.com You already do! We present a challenge on language leaks. Read More
Charted waters Published on November 26, 2024November 26, 2024 by fivecolorssandt@icloud.com More than depths A nautical chart contains an enormous amount of information, if you can read it. Read More
Attention to detail Published on October 22, 2024October 18, 2024 by fivecolorssandt@icloud.com Small mistakes We compare old and new examples of unforgiving calculations. Read More
Notice to Mariners Published on May 21, 2024May 20, 2024 by fivecolorssandt@icloud.com Software updates A system of correction and new information long predates digital computers. Read More
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