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Horseshoe Crabs
Critters Galleries Medicine Nature Science 2026

Horseshoe Crabs (Limulus polyphemus) evolved some 450 million years ago.[1] They have no close relatives in the world today. They are true living fossils and generally fascinating. First, they are not crabs—but remotely related to spiders. They have nine eyes, two underneath near the legs. They have twelve legs, including specializations for pushing, feeding, and mating (males). They breathe and excrete using book gills just behind their legs. And here's the best part—they chew with their knees!
Aurora Borealis in Northern Minnesota
Galleries Nature Photography Science 2025

I was visiting friends in northern Minnesota and had just finished a good meal. We were all fading fast so I said good night and headed for my hammock. As my eyes adjusted to the dark I noticed that the sky looked kind of strange—like city glow from a nearby town. Then, on the edge of the glow, I saw the tell-tale green curtains of the Northern Lights!
Total Eclipse & Snake Road
Birds Galleries Science Travel 2024

Last week I traveled with my Sister Diana to Southern Illinois hoping to experience the Total Solar Eclipse. We were not disappointed! We had mostly blue skies that day with some high stratus clouds. Nothing can really prepare you for the moment of totality. We could suddenly see “stars” (actually the planets Venus and Jupiter) in the odd twilight. It got perceptively cooler and the wind changed direction.
Review of Pandemic (The Game)
Medicine Reviews Science 2020

I bought this award-winning board game about three years ago not guessing how relevant it would become. Now that many of us are sheltering in place from COVID19, what could be better than a science-based game where the goal is to cooperate in order to defeat life-threatening viruses!
Clair Cameron Patterson, The Age of the Earth, & Environmental Lead
History Science 2010

I’m currently reading A Short History of Nearly Everything by Bill Bryson. About a third of the way in he introduces Clair Cameron Patterson who could be the model of the modern citizen/scientist.
Rebuilding the Food Pyramid
History Medicine Science
Willett & Stampfer (2003)

For more than ten years the U.S. Department of Agriculture has promoted its food pyramid as a guide to proper nutrition. The only problem is that it isn't very good advice! The authors of this January 2003 article in Scientific American provide much better guidance. But first a little history…
Wrens Singing a Duet
Birds Nature Science Video 2011

Plain-tailed wrens (Pheugopedius euophrys) cooperate to produce a duet song in which males and females rapidly alternate singing syllables. From Neural Mechanisms for the Coordination of Duet Singing in Wrens by Fortune, Rodríguez, et al in Science 4 Nov 2011.
History of 200 Countries Over 200 Years
History Science Video
Hans Rosling (2010)

This spectacular section of 'The Joy of Stats' tells the story of the world in 200 countries over 200 years using 120,000 numbers - in just four minutes. Plotting life expectancy against income for every country since 1810, Hans shows how the world we live in is radically different from the world most of us imagine. [source:youtube]

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