Charles Darwin’s idea of Natural Selection as the key driver of evolution has been demonstrated many times over. However, in the century and a half since his lifetime, scientists have added onto his theories as various scientific discoveries have been made. Perhaps no one has reframed the picture of Darwinian evolution as much as the […]
Lynn Margulis and Eukaryotic Cells Read More »
The two pictures shown here accompanied two of the most important “aha!” moments in history. The first is “Photo 51,” taken under the laboratory research of Rosalind Franklin. It shows an X-ray diffraction pattern of DNA, and Franklin, Watson, and Crick used it to figure out the molecular structure of life itself.The second is a
Famous Images From Science Read More »
I have another person to add to my list of imaginary attendees in my hypothetical dinner party. Might I introduce to you one Margaret Lucas Cavendish (d.1673)?.Margaret’s life shows just how much human potential has been wasted by limiting women’s access to education. She gleaned hers through conversations of the men around her — her
Margaret Lucas Cavendish Read More »
The lunar crater you see here is Aristarchus, and we’re not going to be be able to get any closer than that to an accurate portrait of the eponymous Ancient Greek astronomer because most of his writings — as well as any contemporary sculpture or paintings of the man — are lost to the sands
Aristarchus’s Model of the Universe Read More »
“I’m gonna have to science the shit out of this,” says the main character of Andy Weir’s _The Martian_, and proceeded.to use every bit of his resourcefulness to harness the power of knowledge to save himself. That movie is fictional, but actual scientists have done this (Hello, COVID-19 vaccination developers, I’m talkin’ to you there).
Clair Patterson and Lead Poisoning Read More »
These two images reflect the ancient Colorado peoples, who lived as the earliest nomads of the region. Some exciting research from this area is challenging entrenched ideas about how our human ancestors lived.The mammoth skeleton is from the very first peoples, known as the Paleoindians. Dating as far back as 13,000 years ago, archaeologists have
Ancient Colorado Peoples Read More »
Those of us who love travelling to new places enjoy the sensation of adventure and the way it makes us open to learning new things, but few of us today risk our lives for such experiences. However, Maria Sibylla Merian was different. In 1699, this affluent 52-year old divorced mother of two left her affluent
Maria Sibylla Merian Read More »
Behold the Wonderwerk cave in South Africa, yet another place on my travel bucket list and also an archaeological site giving evidence for one of the most important inventions humans ever came up with: cooking.Ashes and bone fragments from Wonderwerk have been found from a million years ago, suggesting that our distant relatives, Homo Erectus,
Wonderwerk Cave of South Africa Read More »
This sweet painting by Ferdinand Georg Waldmüller from 1854 is called _Grandmother with Three Grandchildren_. In it , three cheery young girls surround a seated older woman, eyes gazing on some scrap of paper she is holding. All four females are comfortable with each other, and wear relaxed and happy expressions. The image of
The Grandmother Thesis Read More »
66 million years ago, there was a Very Bad Day for nearly everyone on the planet. That’s when the asteroid responsible for ending the age of the dinosaurs crashed into the Yucatan Peninsula and destroyed about 78% of all species.This picture from Trinidad Lake State Park in Colorado shows one of the places where the
The Asteroid that Killed the Dinosaurs Read More »
This is Ilya Ivanov, sometime known as the “Red Frankenstein” because of his experiments with inter-species breeding.In the early days of communist Russia, Ivanov earned a reputation for developing artificial insemination techniques that allowed him to develop hybrids of closely-related species: “zeedonks” (zebra with donkey), “zubrons” (European bison with cows) and sundry blends of rabbits,
The “Red Frankenstein” Read More »
Epidemiological studies is a fascinating blend of science and history. There’s a lot of ways we can benefit now from the study of past disease. The pock-marked friars shown here might well have been suffering from an illness that most folks today are blessedly free from: measles.Measles is a human virus (MeV), but, like SARS-COV2,
Epidemiological Studies Read More »
It’s difficult to make a hero out of Edward Jenner, the doctor who developed one of the earliest types of vaccinations (for smallpox), but did so by experimenting on a nine-year old kid (James Phipps, the son of Jenner’s gardener). That kind of callousness fuels the fire of all sorts of negative stereotypes about scientists,
Barry James Marshall and His Ulcers Read More »
This is “Arctium lappa,” aka burdock. Originally from Eurasia, it is now an invasive species in North America — this beautiful specimen was flowering yesterday in the Shenandoah National Park, and July and August are typical months when the spiny bulbs blossom in lavender and purple. Although burdock root has long been used in cuisines
Burdock in Shenandoah National Park Read More »
We hairless humans have been wearing clothing for a long, long time, but exactly when is hard to tell — paintings, statues, or fabrics that give evidence of our garb only appear long after scientists think we started dressing. A paper published by Toups et al. in the journal _Molecular Biology and Evolution_ in 2011
Dzudzuana Cave, human fabric, and skin lice Read More »
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 »
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 »
