Mars in the Australian Press, 1875-1899. 2. Circulation and AttributionBetween 1875 and 1899, Mars occupied a prominent and recurring position in newspaper reporting across Europe, North America and beyond. Although the scientific and cultural dimensions of this "Mars…Richard de Grijs·Mar 24, 2026SaveLearn
Mars in the Australian Press, 1875-1899. 1. Interpretation, Authority and Planetary Science[Abridged] In the late nineteenth century, Mars emerged as one of the most intensively reported astronomical objects in the popular press, driven by favourable oppositions, improved telescopic…Richard de Grijs·Mar 24, 2026SaveLearn
Conventionalism in general relativity?: formal existence proofs and Reichenbach's theorem θ in contextWeatherall and Manchak (2014) show that, under reasonable assumptions, Reichenbachean universal effects, constrained to a rank-2 tensor field representation in the geodesic equation, always exist in…Ruward Mulder·Mar 22, 2026SaveLearn
Ceci n'est pas un gluonWe discuss and then resolve a tension between how physicists treat gauge bosons and the celebrated "Wu-Yang dictionary", which identifies particle physics terminology with that of principal bundles…India Bhalla-Ladd, Eleanor March, James Owen Weatherall·Mar 19, 2026SaveLearn
Projection and Invariance in Scientific ExplanationAny representational enterprise must omit variation in order to function. NASA still uses Newtonian mechanics, though Einstein superseded Newton, and the standard picture of scientific progress…Harry Sticker·Mar 17, 2026SaveLearn
Does Quantum Cosmology Predict the Age of the Universe?The problem of time of quantum gravity has been argued to make canonical approaches unsatisfactory. In this article I study how it affects quantum cosmology and reach the same conclusion. The…Álvaro Mozota Frauca·Mar 10, 2026SaveLearn
The Architecture of Inter-Level RepresentationInter-level connections in science routinely require constructs that neither of the connected theories contains. Statistical mechanics requires assumptions such as the Stosszahlansatz to generate…Harry Sticker·Mar 10, 2026SaveLearn
Blindspots of empiricism in the discovery of chaos theoryChaos theory is a branch of classical physics, founded in the 1960s-70s, that studies systems whose solutions are sensitively dependent on their initial conditions. For many, it is surprising that…Brett Park·Mar 8, 2026SaveLearn
Observational Indistinguishability and the Beginning of the UniverseCan we infer whether all of physical reality began to exist? Several novel results are offered suggesting a negative verdict. First, a common strategy for defending a cosmic beginning involves…Daniel Linford·Mar 4, 2026SaveLearn
Lord Kelvin's Second CloudOn April 27, 1900, William Thomson, better known as Lord Kelvin, delivered a visionary speech before the Royal Institution of Great Britain. In it, he presented two unresolved problems which, to him,…Gilles Montambaux·Mar 4, 2026SaveLearn
A dimensional analysis path to h and the Bohr atom structureTraditionally, the Planck constant h makes its debut appearance in quantum physics textbooks in the context of the blackbody radiation law and subsequently as a fundamental ingredient of the…Kostas Glampedakis·Mar 3, 2026SaveLearn
Activation and Alignment: A Causal Account of the Scientific RevolutionStandard historiographical approaches to the Scientific Revolution illuminate background conditions but leave three puzzles unresolved: what triggered the initial escalation of inherited tensions,…Harry Sticker·Mar 2, 2026SaveLearn
Portrait of the mathematician as a young man: Revisiting Trinity's Tayler pictureA 17th-century oil painting by an unknown artist, once owned by the Tayler family and now in the collection of Trinity College, Cambridge, is currently identified as a portrait of a young Isaac…Alejandro Jenkins·Mar 1, 2026SaveLearn
Evgeny P. Velikhov (1935-2024)The master student at Lomonosov University in Moscow E.P. Velikhov formulated 1959 the theory of magnetorotational instability, which dominates current astrophysics. A meteoric career made him later…Günther Rüdiger·Mar 1, 2026SaveLearn
The Birth of Quantum Mechanics and the Dirac EquationThe year 2025 marked the centennial of quantum mechanics, inaugurated by Heisenberg's matrix formulation and the foundational contributions of Pauli, Schrodinger, and Dirac. Concurrently, 2026 marks…Volodimir Simulik, Denys I. Bondar·Feb 27, 2026SaveLearn
De-Idealizing De-Idealization: Beyond Full ReversalThere is a question of whether de-idealization is needed for justified use of -- for 'checking' -- idealizations. We argue that the standard philosophical account of de-idealization has become too…Yichen Luo, Eugene Y. S. Chua·Feb 24, 2026SaveLearn
Dutch Colonial Time: Time Signals in Paramaribo and the Dutch CaribbeanIn the nineteenth century, the Dutch established time signals in their Atlantic colonies to synchronise maritime navigation with European standards. In Paramaribo (Suriname), a sophisticated sequence…Richard de Grijs·Feb 22, 2026SaveLearn
Marking Noon: The Time Balls and Time Flaps of the NetherlandsIn the nineteenth century, the Netherlands quickly adopted the time ball -- a British innovation for maritime chronometer calibration -- in its main naval ports (Nieuwediep/Den Helder, Vlissingen,…Richard de Grijs·Feb 22, 2026SaveLearn
C.V. Raman's Exploration in Optics -- A Spectrum of HistoryC.V. Raman (1888-1970) was one of the pioneering scientists to have emerged from India during the colonial era. His scientific explorations were driven by his curiosity to understand wave phenomena.…G. V. Pavan Kumar·Feb 20, 2026SaveLearn
The Causal Second LawI argue that if a special science satisfies certain key assumptions that are familiar from physicalist accounts of the special sciences and from physics, then its causal regularities have an…Balazs Gyenis·Feb 19, 2026SaveLearn
The road of quantum entanglement: from Einstein to 2022 Nobel Prize in PhysicsWe explain the achievements that were awarded 2022 Nobel Prize in Physics, as well as the preceding and the later developments. The main notions and historic cornerstones of Bell inequalities, the…Yu Shi·Feb 16, 2026SaveLearn
A Huygens-Leibniz-Lange framework for classical mechanicsI discuss the physical basis of classical mechanics, such as expressed commonly using the framework of Newton's Principia. Newton's formulation of the laws of motion is seen to have quite a…J. W. van Holten·Feb 15, 2026SaveLearn
Making Symmetry Explicit: The Limits of SophisticationSymmetry is often treated in philosophy of physics as an interpretive problem. A particularly lively dispute concerns local symmetries: do they indicate surplus structure that ought to be expunged,…Henrique Gomes·Feb 14, 2026SaveLearn
Scale Invariance, Variety and Central ConfigurationsScale invariance has received very little attention in physics. Nevertheless, it provides a natural conceptual foundation for a relational understanding of the universe, where absolute size loses…Maria I. R. Lourenço, Julian Barbour, Francisco S. N. Lobo·Feb 11, 2026SaveLearn
Between equilibrium and fluctuation: Einstein's heuristic argument and Boltzmann's principleWe critically revisit Einstein's 1905 heuristic argument for lightquanta, considering its internal coherence and the scope of its applicability. We argue that Einstein's reasoning, often celebrated…Enric Pérez, Antonio Gil·Feb 11, 2026SaveLearn