“By 1.76 million years ago, early humans began to create hand axes.” This seemingly simple statement about hand axes is mind-opening and philosophically significant for a few reasons. It highlights the ingenuity of early humans. Crafting tools from stone requires planning, foresight, and understanding of cause and effect. It also represents a critical leap in […]
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The Oort Cloud may be real, but it remains unseen. It is a strong speculative idea: rationally proposed, empirically unconfirmed, and waiting for direct observation.
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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30 Phil, Chapter 21, Galileo, Touchstone 52: Relativity Principle. The Relativity Principle states that the laws of physics are the same for all observers in uniform motion relative to one another. This means that the passage of time, the length of objects, and the speed of light are the same for everyone, regardless of their
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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.
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 ancient site of Çatalhöyük was not continuously known through historical records and was rediscovered in the modern era. It was first excavated by James Mellaart in 1958, who conducted major excavations between 1961 and 1965. These excavations revealed a wealth of information about Neolithic life and brought significant attention to the site. Its discovery
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