This little beauty is an artist’s rendition of a Placoderm – an extinct fish from close to 500 million years ago which had a significant feature that has played out into the lives of all humans today. Early fishes from this geological period had jaws, and evolutionary scientists have recognized jawed vertebrate fish as the […]
The Extinct Placoderm and Adaptive Immune Systems Read More »
The COVID outbreaks in American meat-packing warehouses have recently cast attention to the frankly horrifying working conditions in these plants. Like coal-mining and cesspool-cleaning, the practice of animal slaughter and butchery has a long history being considered an undesirable profession — it is one that most of society benefits from, even as the general population
Medieval Japanese Butchery Read More »
Pesky flies torment this poor dog in a Medieval manuscript from the early 1300s. Then and now, we have seen these insect vermin as an annoyance. In the Middle Ages, however, flies were associated with something far more sinister — demons.So it was that in the fourteenth century, a poor woman called Ermine de Reims
Flies and Their Relation to Demons Read More »
This sculpture by Paul Lancz from 2014 is one of the many public works of art always on display in the city of Montreal. Entitled “La Tendresse/ Tenderness,” it captures a ubiquitous display of affection between mother and child. This physical gesture of a mother kissing her baby has been a hallmark of affection uniting
The Importance of Maternal Kisses Read More »
Along a particularly rocky portion of the Tuscarora Trail in Perry County, Pennsylvania, is situated a 3,037-acre wildlife sanctuary established by Florence W. Erdman in memory of her mother. The F.J. Reineman Wildlife Sanctuary dates from 1966, and the trust establishing this land gave it to Dickinson College in Carlisle, Pennsylvania, which is just near
The F.J. Reineman Wildlife Sanctuary Read More »
Since the year 2000, the Audubon Society has been involved with the site shown here called Hawk Watch. Located at Waggoner’s Gap along the Kittatinny Ridge just north of the town Carlisle in south-central Pennsylvania, Hawk Watch has a legacy of being a major corridor for thousands of hawks, eagles, and falcons who traverse across
Hawk Watch at Waggoner’s Gap Read More »
Here come two points about human evolution – the first is one that I imagine is not surprising to you, but the second may be, and might make you wince.First, the animal in this photo is not an ancestor of us Homo Sapiens. We did not evolve from apes but share a common progenitor that
Junk DNA and Our Common Ancestors Read More »
When does the story of Alice actually intersect with rabbits? In the case of evolutionary history — and a failed attempt at biological warfare in Australia.I can think of nothing that demonstrates the process of biological evolution more clearly than viruses. Because their genomes are so small, their genetic mutation rates produce a rapid effect.
“The Red Queen Hypothesis” in European Rabbits Read More »
This picture is neither a coffee stain nor a bad tattoo, but rather a fossil from one of the most important places that evolutionary scientists study the emergence of complex life: the fossils of Burgess Shale in British Columbia.Burgess Shale fossils date from the period of the Cambrian Explosion (525-505 million years ago), when “all
Burgess Shale Fossil in British Columbia Read More »
Evolution brings a sense of humility like nothing else can. Ladies and gentlemen, may I introduce you to our ancestors? Featured on the first slide is “Kimberella,” probably the oldest of the “protostome” fossils, dating 255 million years ago – from before the pre-Cambrian explosion.“Aha,” you might be thinking. “That doesn’t look like even the
Kimberella – the Oldest Protostome Fossil Read More »
“The difference in mind between man and the higher animals, great as it is, is one of degree and not of kind,” wrote Charles Darwin, in his famous _The Descent of Man_ in 1871. And evolutionary biologists still agree. So then what makes the mental capacities of Homo Sapiens and other hominid apes so different?Two
Brain Size in Homo Sapiens Read More »
Wanna know the difference between this kid and a chimpanzee? So do evolutionary biologists . . . And with the use of genetic studies, scientists recently have figured out two additional ways that we Homo Sapiens differ from our common primate chimp ancestors from six to eight million years ago. They have to do with
Genetic Differences Between Children and Chimpanzee’s Read More »
By the Early Modern period in England, many people associated witches with their accompanying animals called “familars.” At the bottom of this woodcut you can see “Boy” (also “Boye”) the dog and alleged familiar of the military leader Prince Rupert of the Rhine, who died with his master in battle in 1644.The familiars of 17th-century
Witches and their Familiars Read More »
This is St. George Jackson Mivart, and he ruffled the feathers of proponents of every side of the evolution debates of the 19th century. The second slide is a fossil of a ancient species called Archaeopteryx, and its ruffled feathers were at the center of evolutionary debates of the 19th century.Mivart was raised Anglican but
St. George Jackson Mivart and the Archaeopteryx Read More »
Meet Julia Barlow Platt (1857-1935), who in her 70s was elected as the first female mayor of Pacific Grove, California. She spent her late years galvanizing efforts to create a nature preserve on Monterey Bay, which is still one of the most lovely areas on California’s northern coast. Behind these achievements, however, is a story
Julia Barlow Platt, Embryotic Cells, and California Politics Read More »
A few days ago I did a post featuring a fossil of a creature called Archaeopteryx, famed for having traits both bird- and dinosaur- like: it filled in a gap in the evolutionary record. The photo you see here is of the paleo-biologist Neil Shubin with a model of a creature whose fossils he found.
Neil Shubin and the Tiktaalik Read More »
Historians are frequently enchanted by things discarded as useless by the general public. But I think anyone interested in evolution would find the study of non-gene coding DNA fascinating, including the scientist featured here. This is Susumu Ohno, one of the United States’ foremost geneticists and evolutionary biologists, and he came up with the term
Susumu Ohno’s “Junk DNA” Read More »
The global situation right now is dominated by discussion of COVID-19, as well as the Herculean attempts to create a vaccine for the disease. And as reports of the Phase III trials start to come in, we can look at this photo — a scientist’s laboratory from the early 20th century, cluttered and filthy. Rotting
Thomas Morgan and Gene Studies Read More »
Medieval violent bunnies onstage for this post, which makes me laugh no matter what.We do not expect these furry (mostly) vegetarian creatures to be shown inciting bloodshed, or picking on poor unarmored monks (slide two), or mauling naked men when they are sleeping (slide three), or viciously destroying King Arthur’s entourage (the Rabbit of Caerbannog,
Medieval Violent Bunnies and Knighthood Read More »
You are looking at vistas along the Long Pond Trail, an isolated and somewhat arduous trek through some of the loveliest mountainous paths that make up the Green Ridge State Forest in western Maryland. Like so much of the Atlantic seaboard states, the forests of the Green Ridge were all but eliminated around the late
Long Pond Trail Vistas in Maryland Read More »
