Posts Tagged ‘Mendel’
“An understanding of the natural world, and what’s in it is a source of not only great curiosity but great fulfillment”*…
Ah yes, but in what does that understanding consist? John Long considers the competing frameworks of Linnaeus and Buffon…
The modern science biography must hold back no punches in its mission to represent the subject’s life, equally celebrating their great works while including their personal shortcomings.
Jürgen Neffe’s Einstein: A Biography (2005) and Dava Sobel’s The Elements of Marie Curie (2024) are wonderful examples of this style. Such books succeed in clearly explaining the complex science of their subject’s work for non-scientific readers, enabling a deep appreciation of their achievements and bringing them to life as rounded, flawed humans.
The modern science biography must hold back no punches in its mission to represent the subject’s life, equally celebrating their great works while including their personal shortcomings.
Jürgen Neffe’s Einstein: A Biography (2005) and Dava Sobel’s The Elements of Marie Curie (2024) are wonderful examples of this style. Such books succeed in clearly explaining the complex science of their subject’s work for non-scientific readers, enabling a deep appreciation of their achievements and bringing them to life as rounded, flawed humans.
Jason Roberts’ Every Living Thing – The Great and Deadly Race to Know all Life is another of these rare works. This engrossing, precisely researched book focuses on two central characters born in the same year: Carl Linnaeus (1707-1778), a Swede, and Frenchman Georges-Louis LeClerc, the Compte de Buffon (1707-1788), better known as just Buffon.
Roberts’ book won the 2025 Pulitzer Prize for biography. His writing pulls the reader effortlessly through the story, revealing delightful, unexpected twists and turns in the two men’s complex and disparate lives. Each worked diligently to reach a level of global notoriety for their many published books. Both are revered in the natural history world today.
Linnaeus, a biologist and physician, is known for his system of hierarchical classification: how all living things comprise a genus and species, (we humans are Homo sapiens), which fit into families, orders, classes and so on. (A good many intermediate ranks were added later). While his work has been hugely influential, Linnaeus is portrayed by Roberts at times as being lazy, vain and unethical.
Linnaeus was primarily driven to be the first to name new species. Buffon was working on a grand thesis of how all life’s organisms function and are related to one another. A wealthy count who inherited a vast fortune at the age of ten, Buffon trained as a lawyer but became fascinated by the trees that grew in his large garden.
Buffon is best known today for his extensive books on natural history and works on mathematics and cosmology. He calculated the Earth was much older than the Bible predicted and that life sprung from unorganised matter. He explored the relationships between organisms rather than how they were classified. His core work formed the basis for modern evolutionary theory.
Why was all this important? At the time, the task of classifying plants was vital to the growing economies of nations. Travellers to the far reaches of the globe brought back examples of economically valuable new species, like plant foods, medicinal plants or beautiful ornamental specimens.
The author’s central thesis is Linnaeus was not as brilliant as history paints him and Buffon was a far greater genius for his day.
Where does genius come from, Roberts asks? Is it inherent by birth, grown from an inspiring education, or is it something within that is nurtured by passion?
Both these brilliant men who made a lasting mark on science came from not very inspiring families. Nor did they excel at school or university. This story shows success in academic work is not just about intellect, but intimately tied to the ethics and morality of doing research…
Eminently worth reading in full: “How do we understand life on Earth? A prize-winning biography charts the tension between two types of science ‘genius’” from @theconversation.com.
* David Attenborough, who also observed, “We moved from being a part of nature to being apart from nature.”
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As we noodle on knowing, we might send birthday greetings to Gregor Mendel; he was born on this date in 1822 (though some sources give the date as July 20). A botanist, geneticist, and monk, he pioneered in the study of heredity.
Mendel spent his adult life with the Augustinian monastery in Brunn, where as a plant experimenter, he was the first to lay the mathematical foundation of the science of genetics, in what came to be called Mendelism. Over the period 1856-63, Mendel grew and analyzed over 28,000 pea plants. He carefully studied for each their plant height, pod shape, pod color, flower position, seed color, seed shape and flower color. He made two very important generalizations from his pea experiments, known today as the Laws of Heredity, and coined the genetic terms recessiveness and dominance. He read a paper on his studies in 1865 to the Brünn Society for Natural Sciences in Moravia– but it lay unappreciated until 1900.
“For you formed my inward parts; you knitted me together in my mother’s womb. I praise you, for I am fearfully and wonderfully made.”*…
DNA is indisputably important to biological development. But, Alfonso Martinez Arias argues, far from being a blueprint for an organism, genes are mere tools used by life’s true expert builders: cells…
… Over the past century, scientists have discovered a material explanation for the source of life, one that needs no divine intervention and provides a thread across eons of time for all beings that exist or have ever existed: deoxyribonucleic acid — DNA. While there is little doubt that genes have something to do with what we are and how we come to be, it is difficult to answer precisely the question of what their exact role in all of this is.
A closer look at how genes work and what they can accomplish, compared to what they are said to achieve, casts doubt on the assertion that the genome in particular contains an “operating manual” for us or any other living creature. When it comes to the creation of organisms, we’ve overlooked — or, more accurately, forgotten — another force. The origin and power of that force are cells.
What makes you and me individual human beings is not a unique set of DNA but instead a unique organization of cells and their activities…
A fascinating essay, adapted from Martinez Arias’ forthcoming book, The Master Builder- How the New Science of the Cell Is Rewriting the Story of Life: “Cells, Not DNA, Are The Master Architects Of Life,” in @NoemaMag.
[Image above: source]
* Psalm 139: 13–14
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As we delve into design, we might send insightful birthday greetings to Ernst Mayr; he was born on this date in 1904. A taxonomist, tropical explorer, ornithologist, philosopher of biology, and historian of science, he is best remembered as one of the 20th century’s leading evolutionary biologists. His work contributed to the conceptual revolution that led to the modern evolutionary synthesis of Mendelian genetics, systematics, and Darwinian evolution, and to the development of the biological species concept.
His theory of peripatric speciation (a more precise form of allopatric speciation which he advanced), based on his work on birds, is still considered a leading mode of speciation, and was the theoretical underpinning for the theory of punctuated equilibrium, proposed by Niles Eldredge and Stephen Jay Gould. Mayr is sometimes credited with inventing modern philosophy of biology, particularly the part related to evolutionary biology, which he distinguished from physics due to evolutionary biology’s introduction of (natural) history into science.
“I like it when a flower or a little tuft of grass grows through a crack in the concrete. It’s so f#@kin’ heroic.”*…
From dilapidated power plants, abandoned medical facilities, and amusement parks left in rusted ruin, the compelling scenes that French photographer Jonathan Jimenez, aka Jonk (previously), captures are evidence of nature’s endurance and power to reclaim spaces transformed by people. Now compiled in a new book titled Naturalia II, 221 images shot across 17 countries frame the thriving vegetation that crawls across chipped concrete and architecture in unruly masses.
This succeeding volume is a follow-up to Jonk’s first book by the same name and focuses on the ways the ecological crisis has evolved during the last three years. He explains the impetus for the book in a statement:
On the one hand, the situation has deteriorated even further with yet another species becoming extinct every single day. Global warming continues and has caused repeated natural catastrophes: floods, fires, droughts, etc. On the other hand, our collective awareness has widely increased. We are still a long way from the commitment needed to really change things, but we are heading in the right direction. Millions of initiatives have already emerged, and I hope that my photos and the message contained within them can play a small part in the collective challenge facing us all…
More at “Nature Resurges to Overtake Abandoned Architecture in a New Book of Photos by Jonk” and at his site.
On an apposite note: “Forest the size of France regrown worldwide over 20 years, study finds.”
* George Carlin
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As we inspect the inexorable, we might spare a thought for Hugo Marie de Vries; he died on this date in 1935. A botanist, he introduced the experimental study of organic evolution– and was, thus, was one of the first geneticists. His rediscovery in 1900 (simultaneously with the botanists Carl Correns and Erich Tschermak von Seysenegg) of Gregor Mendel’s principles of heredity and his theory of biological mutation, though considerably different from a modern understanding of the phenomenon, resolved ambiguous concepts concerning the nature of variation of species that, until then, had precluded the universal acceptance and active investigation of Charles Darwin’s system of organic evolution.
He suggested the concept of genes and introduced the term “mutation”, and developed a mutation theory of evolution.
“Not with a bang, but with a whimper”*…
Death Table from Tuberculosis in the United States, prepared for the International Congress on Tuberculosis, September 21 to October 12, 1908. Image: U.S. National Library of Medicine
Recent history tells us a lot about how epidemics unfold, how outbreaks spread, and how they are controlled. We also know a good deal about beginnings—those first cases of pneumonia in Guangdong marking the SARS outbreak of 2002–3, the earliest instances of influenza in Veracruz leading to the H1N1 influenza pandemic of 2009–10, the outbreak of hemorrhagic fever in Guinea sparking the Ebola pandemic of 2014–16. But these stories of rising action and a dramatic denouement only get us so far in coming to terms with the global crisis of COVID-19. The coronavirus pandemic has blown past many efforts at containment, snapped the reins of case detection and surveillance across the world, and saturated all inhabited continents. To understand possible endings for this epidemic, we must look elsewhere than the neat pattern of beginning and end—and reconsider what we mean by the talk of “ending” epidemics to begin with…
Contrary to hopes for a tidy conclusion to the COVID-19 pandemic, history shows that outbreaks of infectious disease often have much murkier outcomes—including simply being forgotten about, or dismissed as someone else’s problem: “How Epidemics End.”
* T. S. Eliot, “The Hollow Men”
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As we contemplate the end, we might send insightful birthday greetings to Nettie Maria Stevens; she was born on this date in 1861. A geneticist– and one of the first American women to achieve recognition for her contributions to scientific research– she built on the rediscovery of Mendel‘s paper on genetics (in 1900) with work that identified the mechanism of sexual selection: its determination by the single difference between two classes of sperm—the presence or absence of (what we now call) an X chromosome.
“Just as the twig is bent, the tree’s inclined”*…
In certain forests, when you look up you will see a network of cracks formed by gaps between the outermost edges of the tree branches. It looks like a precisely engineered jigsaw puzzle, each branch growing just perfectly so it almost—but not quite—touches the neighboring tree. This beautiful phenomenon is called crown shyness.
Crown shyness doesn’t happen all the time, and scientists aren’t completely certain why it happens at all…
The forest keeps its secrets… Despite decades of study– and a profusion of postulation– no one yet fully understands “The Mysteries of Crown Shyness.”
* Alexander Pope
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As we keep to ourselves, we might spare a thought for Gregor Johann Mendel; he died on this date in 1884. After a profoundly-unpromising start, Mendel became a scientist, Augustinian friar, and abbot of St. Thomas’ Abbey in Brno, Moravia (today’s Czech Republic). A botanist and plant experimenter, he was the first to lay the mathematical foundation of the science of genetics (of which he is now consider the “Father”). Over the period 1856-63, Mendel grew and analyzed over 28,000 pea plants. He carefully studied the height, pod shape, pod color, flower position, seed color, seed shape and flower color of each– and from those observations derived two very important generalizations, known today as the Laws of Heredity.
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