Natural philosophy includes dividing ideas into empirical, rational, and irrational as well as understanding their philosophical context. Philosophical context includes understanding the timing of discoveries and rediscoveries as well as the philosophers behind them and their publications.
While black holes were first proposed in the 18th century, they were not seriously proposed until 1916 with Albert Einstein’s General Relativity. The concept of a “black hole” has its roots in the 18th century when John Michell and Pierre-Simon Laplace independently speculated about the existence of “dark stars” — celestial bodies whose gravity is
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The first image of a black hole was captured in 2019 by the Event Horizon Telescope (EHT) collaboration. Before that, the first observational evidence was discovered in 1964 with the detection of the X-ray source Cygnus X-1, which was later interpreted as material accreting onto a black hole from a companion star. In 1971, Cygnus
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General Relativity incorporated gravity into the mix. It describes gravity not as a force, but as the curvature of spacetime caused by massive objects. According to General Relativity, the curvature of spacetime around an object like the Earth causes objects to fall towards its center, which we experience as gravity. In November 1915, Einstein expanded
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The laws of physics work the same for all observers moving at a constant speed. There is no absolute state of rest.
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Special Relativity explains the relationship between space, time, mass, and energy. It shows that time and space are not separate entities but are connected as a single entity called spacetime. Additionally, it introduced the famous equation E=mc², which demonstrates that mass is engergy, energy is mass. They are equivalent and can be converted into each
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In 1965, Arno Penzias and Robert Wilson, two radio astronomers at Bell Telephone Laboratories, stumbled upon a mysterious and persistent background noise that pervaded their radio telescope. After much investigation and the elimination of potential terrestrial and instrumental sources, they concluded that this noise was cosmic in origin. Their findings, published on May 20, 1965,
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In 1842, the Doppler effect was proposed by Christian Doppler. First confirmed for sound in 1845, then for light in 1848.
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By 1929, an important time in cosmology, Edwin Hubble used the spiral nebulae data collected by Vesto Slipher from 1912 to 1925 to introduce the world to galaxies. Prior to the 20th century, astronomers debated whether spiral nebulae were merely gaseous clouds within the Milky Way, possibly forming solar systems. This view changed dramatically following
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In 1842, Christian Doppler wrote about the doppler effect in stars. It was first confirmed with sound in 1845, then with light in 1848. The big moment came in 1868 when, for the first time, we could tell which stars were coming and going.
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30 Phil, Chapter 3 Touchstone 8: Holism. Holism views things as a whole, emphasizing interconnectedness and interdependence, and values unity and synthesis. It is essential for fully understanding complex systems like living organisms and ecosystems. This notion of an underlying, unifying essence mirrors the intricacies of the natural world, where each element, though distinct, harmoniously contributes
Ontology asks what exists at the deepest level, including whether the self, consciousness, or anything beyond the body is real. For living well, its value is humility: what you believe shapes how you treat this life.
30 Phil, Chapter 2 Touchstone 6: Philosophy. Philosophy is the systematic study of fundamental questions concerning existence, knowledge, values, and meaning. It’s a discipline guided by reason and the evaluation of evidence. A central question is “How should we live?” While there is a general agreement on overarching principles, as always, the devil is in the
30 Phil, Chapter 2 Touchstone 5: Knowledge Framework. In philosophy, the study of knowledge is called epistemology. It’s important because knowledge describes reality, and understanding how we craft knowledge brings philosophical clarity. Each of us maintains a personal knowledge framework that arranges the knowledge we accumulate. You can think of it as a personalized dictionary. But
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30 Phil, Chapter 1 Touchstone 4: Cultural Transmission. Cultural transmission, perhaps more than any other trait, sets humans apart from other animals. It’s the ability to pass behaviors, traditions, and knowledge to the next generation. Cultural transmission has likely been a feature of our direct-line hominin mind for millions of years. Returning to what we
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30 Phil, Chapter 1 Touchstone 3: Evolution. In 1859, the naturalist Charles Darwin revolutionized the scientific world with his seminal publication, “On the Origin of Species.” In it he formulated his scientific theory of evolution by natural selection. The process by which new species arise is well-understood. It proposed that changes in species occur gradually over time. With each generation,
You may not control everything, but you still must choose how to live. Living well means choosing with positive intent now and for the future.
The dawn of collective learning can be traced back the oldest known stone tools, discovered at Lomekwi 3 in Kenya. The creation of these tools required more than just individual innovation; it involved the rudimentary form of collective learning, where knowledge of toolmaking was shared within groups. This early transmission of skills not only enhanced
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NSLCA: The Neanderthal-Sapien Last Common Ancestor was likely Homo heidelbergensis or Homo antecessor. Analysis: Before the discovery of Homo antecessor in the 1990s, Homo heidelbergensis was considered the primary candidate for the NSLCA due to its chronological and morphological position in the human lineage. The discovery of Homo antecessor, with its more modern-looking facial features, has
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Long before doctors, early great apes were using simple treatments to feel better. This was not science, but it was the beginning of healing.
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The Great Apes LCA is one of our deep evolutionary crossroads. From this shared root came the living great apes, including us.
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