Distant cousins Published on March 1, 2022February 25, 2022 by fivecolorssandt@icloud.com The extended family We make a count of our relations. Read More
Reading the dial (II) Published on February 22, 2022February 20, 2022 by fivecolorssandt@icloud.com Graphs and indicators Digits can be deceiving. Read More
Reading the dial (I) Published on February 15, 2022February 14, 2022 by fivecolorssandt@icloud.com The graph and the digital clock How do you tell time? Read More
The sky is gone (II) Published on January 11, 2022January 10, 2022 by fivecolorssandt@icloud.com A long history The stars have been getting harder to see for a long time now. Read More
The sky is gone Published on January 4, 2022January 2, 2022 by fivecolorssandt@icloud.com And it’s not coming back Something you didn’t know you had is going away. Read More
Fear of the dark Published on October 19, 2021October 19, 2021 by fivecolorssandt@icloud.com What’s scary? We ponder plastic skeletons and other seasonal paraphernalia. Read More
In praise of mediocrity Published on October 5, 2021October 5, 2021 by fivecolorssandt@icloud.com Home entertainment When you can get world-class entertainment at the touch of a button, why would you do it yourself? Read More
Changing the world, or not Published on September 28, 2021September 26, 2021 by fivecolorssandt@icloud.com Recording sight and sound Some inventions change society; others don’t. Why? Read More
Future puzzles Published on August 31, 2021August 30, 2021 by fivecolorssandt@icloud.com When today is past What will need to be explained to future readers about today’s literature? Read More
Telescope economics Published on June 29, 2021June 29, 2021 by fivecolorssandt@icloud.com Precision low-tech We consider whether to build or buy. Read More