Europeans practiced cannibalism well into the 19th century, and one of the favored ways to consume their own kind happened with beheadings. Here you see close-ups of a 1649 painting by artist John Weesop called “An Eyewitness Representation of the Execution of King Charles I”. Notice in the second image the rush of people collecting […]
Cannibalism in Medieval to 19th-Century Europe Read More »
Early this morning (as in, from 2:30-4:30 a.m.) my part of the world was treated to a near-total lunar eclipse. The shadow of the earth crept across the full moon’s surface, eventually turning it a reddish color (due to the refraction of light through the Earth’s shadow). As anyone who has seen a lunar eclipse
These rocks from the northern shore of Lake Superior are from the dullest period in our planet’s history, apparently. Most of us humans of the early twenty-first millennium do not do well with being bored. Imagine, then, one billion years of it. From 1.8 to 800 million years ago, Earth’s life forms remained relatively
The Boring Billion Read More »
Yesterday I did a post about the “boring billion”: a period of Earth’s history when very little changed. Today I offer the exact opposite, which is the most exciting two minutes in all of existence. And those in fact were the first two minutes of everything, at the start of the Big Bang. We
No, this isn’t what you think it is, readers: I know it *looks* like a penis, but really it’s not. Rather, what you see is a 16th-century woodcut illustration of the dissected genitals of a woman. Er, if that’s not obvious to you, don’t worry. Commissioned for Andreus Vesalius’s famous _De humani corporis fabrica_
De humani corporis fabrica Read More »
This is Jonas Salk, inventor of the first polio vaccine, ending the childhood disease that had killed or crippled so many Americans — especially children — in the mid-20th century. But Salk was important for other reasons. His approach to designing the vaccine was innovative, using a denatured version of the virus rather than
Many of us have had need to wrap presents in the last few weeks, but maybe only some of us waited until early this morning on December 25 to start wrapping their children’s gifts. (Yours truly, ahem). The discipline of intentionally folding paper into different shapes is known as origami because this practiced flourished
Here are four different species of finches from the Galapagos Islands. Although they look similar, their differences include their beaks — each one takes advantage of a different type of seed. Natural selection shaped the trajectory of these birds’ appearance, and one of the scientists who first figured out how this worked passed away yesterday
Edward Osborne Wilson Read More »
The root system you see here isn’t just part of the plant: it’s joined by fungi, making it a mycorrhiza — a symbiosis of plant and fungi. Most plants rely on mycorrhizae — the fungi elements give the roots better access to precious nutrients like phosphorous and water, and the plant bits give the fungus
Mycorrhiza: Symbiosis of Plant and Fungi Read More »
TIL that 30 million years ago a species of mound-building termites evolved with next-level techniques that we humans could learn from in order to deal with our environmental challenges. These are the Macrotermes, and what makes them particularly special is the very ancient relationship they co-created with the fungus Termitomyces. Neither survives without the
Termites and Mushrooms: A Quid Pro Quo Read More »
I love how scientific technologies are helping us understand the earliest millennia of human history ever better. This drawing, for instance, features an artistic re-creation of skull fragments dated in 2017 that have helped to overturn our understanding of human evolution. Basic questions, such as “how long have Homo Sapiens been around?” And “where
Appearances of Homo Sapiens Read More »
You are looking at an artist’s rendition of a device known as “the staff of al-Tusi” which sounds like a magical weapon straight out of Tolkien but in fact was a genius scientific tool made by one of the most important mathematicians in history. Sharaf al-Din al-Muzaffar al-Tusi (c. 1135-1213) lived in various cities
The Linear Astrolabe of al-Tusi Read More »
It’s pleasant, from where I write this post in my ice-bitten and wintery grey state of Pennsylvania, to look at this lovely plant. Here is _Indigofera tinctoria_ the most important plant to make the dye colored indigo — a color that meant beauty to some, but misery to many others. Indigo is one of
Malaria is, like COVID, a largely preventable death: so long as the patient gets the right treatment at the right time. Many still do not have access to good medical care. For instance, in 2019, 409,000 people in Africa — mostly babies and toddlers — died of this disease. But malaria is not a
The History of Malaria Read More »
When you were a kid, did you learn that the first humans in the Americas crossed over the Bering land bridge about 12,000 years ago? Scholars have overturned this chronology completely, but it held away for many years in part because of this type of spear- or knife- head technology featured here, which is the
Clovis Culture and Migration Read More »
I adore Medieval flora and fauna mistakes! When they got things wrong, they were so extra about it. So here’s an example of a made-up species that Medieval people thought existed, called the “Barnacle Goose,” or “Branta leucopsis”. Much like the “Lamb of Tartary,” which I did a different post about, the Barnacle Geese
M.C. Escher was an amazing surrealist artist whose works were frequently inspired by mathematics. Here is his 1963 work, “Moebius Strip II,” which shows ants crawling along the single-surface loop. First discovered by astronomer and mathematician August Möbius in 1858 (although it had been described in unpublished literature a few years prior by a
M.C. Escher and the Möbius Strip Read More »
This is a drawing of the prehistoric species Plesiosaurus, discovered by the paleontologist Mary Anning in 1823. Anning was a working-class, uneducated person who became one of England’s premier fossil scholars, but struggled her whole life — financially and professionally — because of her gender and class. Anning grew up on the southern coast
Mary Anning’s Plesiosaurus Read More »
This lovely creature was a Dinogorgon, one of many types of animals known as “Gorgonopsia,” the apex predators in the Permian Period. When I learned about how boss these creatures were, the nine-year-old paleontologist in me felt cheated because of all the front stage play that dinosaurs get. But these animals were amazing and thrived
This is a picture of Hvalsey Church, a Norse ruin from a settlement in Greenland that was abandoned in the 1400s. Scientists and historians have recently amended their ideas about what caused the collapse of this culture. In the late 900s, some Vikings from Iceland migrated to Greenland, setting up small communities that lasted
