From First Principles

Krishna Choudhary and Lester Nare

From First Principles is a fast, funny, and rigorous breakdown of the biggest science stories of the week, hosted by Lester Nare and physicist Krishna Choudhary, PhD. We go past headlines into the actual mechanics: what happened, why it matters, and what everyone’s missing. Expect physics, space, AI, energy, biotech, and the occasional “wait… is that real?” story. If you’re curious, skeptical, and you like learning in public — you’re in the right place.

  1. 8 H FA

    FFP EP. 22 | Cloud9 Dark Matter Halo, Jellyfish Sleep, and String Theory Hidden in Nature

    Hosted by Lester Nare and Krishna Choudhary, this episode runs from the deep math of string theory to the biology of sleep—then out to a starless “ghost cloud” that may be a naked dark-matter halo. We open with a Nature paper showing that physical networks in nature (brains, blood vessels, fungal networks) appear to organize like energy-minimizing surfaces—spitting out the same branching rules you see in soap films and (surprisingly) in the mathematics behind string theory. Then we hit a neuroscience twist: even simple jellyfish need sleep—and the evidence points to sleep as a repair cycle for DNA damage. We close with Cloud9, a newly characterized, starless gas cloud that could be a rare “reionization-limited” RELHIC—potentially exposing a dark matter halo without the glare of stars. Summary String theory… in your body? Why real-world transport networks converge toward minimal-energy geometry—and what that has to do with string-theory math and 120° branching angles. Jellyfish need sleep (and it’s not optional): Evidence that sleep pressure tracks cellular stress and DNA damage repair—even in a brainless animal. Cloud9: A nearby starless cloud that may be a dark matter halo in plain sight—plus what it implies about “missing” galaxies and the post-reionization universe. The Rundown: iron asteroids, artificial metabolism (ReForm), scalable helper T-cells from stem cells, and NASA’s Pandora exoplanet mission. Show Notes Physical networks / string-theory-like math (Nature)Jellyfish sleep & DNA repair (Nature Communications)Cloud9 (Astrophysical Journal Letters)

    1 h 40 min

  2. 12 GEN

    FFP EP. 21 | Roman Concrete, Brain “Cognitive Legos,” DeepSeek, and Econophysics

    Hosted by Lester Nare and Krishna Choudhary, this episode jumps from ancient engineering to modern AI and markets. We start with the newly uncovered Pompeii worksite that finally shows how Romans mixed their concrete — and why it “self-heals.” Then we pivot into a Princeton neuroscience idea that the brain builds complex thought like LEGO bricks (compositional neural subspaces). From there, we break down DeepSeek’s “manifold-constrained hyperconnections” as a stability mechanism for scaling deep nets. And we close with econophysics: a Physical Review Letters result arguing the square-root law of market impact is strictly universal across stocks and time. Summary Roman concrete’s missing step — Pompeii evidence for “hot mixing,” lime clasts, and why cracks can heal themselves for millennia.Cognitive LEGOs — a compositionality framework where brains reuse shared neural subspaces to assemble new tasks.DeepSeek’s scaling trick — constraining hyperconnections to a stable manifold to avoid vanishing/exploding signals.The universal market law — PRL evidence that price impact follows a square-root rule across stocks, traders, and decades.Show Notes ⁠Roman Concrete (Pompeii worksite) — Nature Communications (2025)⁠⁠Hot Mixing & Lime Clasts — Science Advances (2023)⁠⁠Compositional Neural Subspaces (“Cognitive LEGOs”) — Nature (2025)⁠⁠mHC: Manifold-Constrained Hyper-Connections — arXiv⁠⁠Square-Root Law of Market Impact (Universality) — Physical Review Letters⁠⁠Artemis II Countdown Demonstration Test — NASA

    1 h 59 min

  3. 23/12/2025

    FFP EP. 20 | The Physics Behind Fusion’s Biggest Problem (Season Finale)

    Hosted by Lester Nare and Krishna Choudhary, this Season Finale closes out Season 1 with a deep dive into the physics behind fusion’s biggest bottleneck: fast magnetic reconnection. We unpack why classic models predicted reconnection should be slow, why nature (and tokamaks) disagree, and how modern “plasmoid” reconnection helps explain solar flares, plasma instabilities, and the real engineering challenges fusion reactors face. Then we run a full Season 1 recap — our favorite episodes, biggest scientific moments, and the corrections and lessons we’re taking into Season 2. Summary Fusion’s biggest problem — magnetic reconnection, why the Sweet–Parker model breaks down at scale, and how plasmoid instability enables fast reconnection.From the Sun to tokamaks — how reconnection drives solar flares, space weather, and plasma confinement limits in fusion devices.Season 1 leaderboard — our top episodes and the breakthroughs that stuck: astronomy, biology, AI, quantum, and the history of science.Corrections + what’s next — what we fixed, what we learned, and how Season 2 evolves the format.

    1 h 18 min

  4. 04/12/2025

    FFP EP. 19 | The Race to the Double Helix — Watson, Crick, Franklin & the Real Story of DNA

    Hosted by Lester Nare and Krishna Choudhary, this single-story deep dive tells the full story of how humanity uncovered the structure of DNA — and the human tensions that shaped it. From Mendel’s pea-plant mathematics to Rosalind Franklin’s groundbreaking x-ray crystallography, from Cavendish–King’s College rivalries to the famous Photo 51, this episode follows the scientific and ethical arc behind one of the most important discoveries in modern biology. Summary Before DNA — Mendel’s inheritance laws, Miescher’s nuclein, Levene’s early models, and why scientists initially believed proteins carried heredity.The turning point — Griffith’s transformation experiment and the Avery–MacLeod–McCarty proof that DNA is the genetic material.The physics connection — Schrödinger’s What Is Life? and the idea of an “aperiodic crystal” inspiring Watson, Crick, and a generation of physicists to enter biology.Two labs, one race — Cavendish vs. King’s College, Wilkins vs. Franklin, and the clash of personalities, methods, and interpretations.Photo 51 — Franklin and Gosling’s pivotal diffraction image revealing the helical structure of DNA.The model — base pairing, antiparallel strands, and why the double helix immediately explained replication.Recognition & legacy — the 1953 Nature papers, the 1962 Nobel Prize, Franklin’s omission, and Watson’s later controversies reshaping his legacy.Show Notes Mendel (1866) — Pea Plant GeneticsGriffith (1928) — TransformationAvery–MacLeod–McCarty (1944)Schrödinger — What Is Life?Franklin’s Photo 51Watson & Crick (1953)

    1 h 34 min

  5. 27/11/2025

    FFP EP. 18 | 3I/ATLAS Explained, Forensic Fingerprints & Alzheimer’s Breakthrough

    Hosted by Lester Nare and Krishna Choudhary, this episode spans astrophysics, forensic chemistry, and neuroimmunology. We begin with a deep dive into 3I/ATLAS, only the third confirmed interstellar object to ever pass through our solar system — larger and stranger than ‘Oumuamua and Borisov, with new imagery released as NASA reopened operations. Then we break down a true-crime forensic breakthrough from Maynooth University that reveals how to recover fingerprints from fired bullet casings — a technique that could radically accelerate criminal investigations. And we close with a Max Planck Institute discovery identifying a regulatory microglial state in the brain that may finally clarify why Alzheimer’s develops — and how immune dysfunction, not just plaques, drives the disease. Summary The third interstellar visitor — 3I/ATLAS joins ‘Oumuamua and Borisov as only the third object ever observed entering the solar system from interstellar space, with new NASA imagery revealing structure, trajectory, and compositional clues. A forensic chemistry breakthrough — researchers at Maynooth University develop a technique to retrieve latent fingerprints from fired shell casings, combining heat-stable organic residues with spectroscopic imaging. A new model of Alzheimer’s — Max Planck Institute scientists uncover a microglial “regulatory” state (a T-reg–like analogue) activated through CD28-dependent pathways, reshaping how the field thinks about plaques, neuroinflammation, and therapeutic targets. Show Notes 3I/ATLAS — Interstellar Object Updates (NASA / JPL)Forensic Chemistry: Fingerprints on Fired Casings (Maynooth University)Alzheimer’s Microglia Study — Max Planck Institute / Univ. of Cologne

    1 h 28 min

  6. 22/11/2025

    FFP EP. 17 | Hypersonic Physics, Deep Sea Life & Princeton’s Millisecond Qubits

    Hosted by Lester Nare and Krishna Choudhary, this episode dives into three breakthroughs stretching across aerospace engineering, astrobiology, and quantum computing. We start with a Nature Communications paper from Stevens Institute that experimentally validates a 60-year-old hypothesis underpinning hypersonic flight modeling. Then we head 3,000 meters below the Pacific to explore a newly discovered cold, ultra-alkaline biosphere near the Mariana forearc — a finding that reshapes the search for extraterrestrial life. And we close with Princeton’s millisecond-coherent transmon qubit, a materials science triumph pushing the quantum hardware frontier toward real-world quantum advantage. Summary Hypersonics without supercomputers — Stevens Institute validates the Morkovin hypothesis up to Mach ~6 using krypton-tagging velocimetry, confirming that “simple” turbulence models still work in hypersonic regimes and opening the door to viable, inexpensive hypersonic aircraft design.Life where it shouldn’t exist — University of Bremen researchers uncover evidence of a chemosynthetic biosphere in the cold, pH-12.6 serpentinizing fluids of the Mariana forearc, offering the clearest Earth analog yet for Enceladus- and Europa-like conditions.A millisecond qubit breakthrough — Princeton’s tantalum-on-high-resistance-silicon transmon hits 1.7 ms coherence, 15× the industry norm — drop-in compatible with Google/IBM architectures and a major step toward practical quantum computing. Show Notes Hypersonics — Nature Communications (Stevens Institute)Deep Sea Life — Nature Communications Earth & Environment (Univ. of Bremen)Princeton Millisecond Qubit — Nature (Transmon Hardware)

    1 h 33 min

  7. 13/11/2025

    FFP EP. 16 | Octopus Camouflage, Orcas vs. Sharks, Civet Coffee & Sub-Diffraction Telescope Tech

    Hosted by Lester Nare and Krishna Choudhary, this super-episode spans four wildly different frontiers: bioengineers hijacking bacterial evolution to mass-produce octopus camouflage pigment; orcas developing cultural hunting strategies against great white sharks; the bizarre chemistry behind civet-processed luxury coffee; and a UCLA breakthrough that pushes telescope resolution beyond the classical diffraction limit. Summary UCSD’s biosynthesis breakthrough — how researchers engineered a growth-coupled, plug-and-play metabolic pathway to mass-produce xanthomatin, the cephalopod pigment behind octopus camouflage.Orca vs. shark culture wars — first-ever documentation of coordinated predation on juvenile great whites in Mexican waters, plus how whales transmit learned behavior socially.The paradox of civet coffee — wild civet gut chemistry, medium-chain esters, and how microbial fermentation creates the world’s most expensive “biologically processed” coffee.UCLA’s telescope hack — a mode-sorting instrument that extracts phase information from starlight, enabling sub-diffraction-limited imaging and revealing asymmetric hydrogen disks around distant stars.Show Notes UCSD — Nature Biotechnology (xanthomatin biosynthesis)Orca Predation Study — Frontiers in Marine ScienceCivet Coffee Chemistry — Nature Scientific ReportsUCLA Sub-Diffraction Telescope Method — ApJ Letters

    1 h 18 min

  8. 06/11/2025

    FFP EP. 15 | AI-Generated Genomes, Retinal Implants, and Palomar’s Mystery Lights Explained

    AI, Eyes, and the Sky — From Synthetic Genomes to Restored Vision and Cosmic Mysteries Hosted by Lester Nare and Krishna Choudhary, this episode of From First Principles explores three cutting-edge breakthroughs connecting medicine, technology, and astronomy. Summary • AI for Oncology, Minus the Privacy Risk: University of Toronto researchers develop OncoGAN—a generative model that creates realistic synthetic cancer genomes to accelerate precision oncology while protecting patient data. • Restoring Sight: The PRIMA (PRIMAvera) trial in NEJM demonstrates how a wireless sub-retinal photovoltaic implant can restore central vision in people with advanced macular degeneration. • Revisiting Cosmic Transients: New analyses of Palomar’s POSS-I plates re-examine the “multi-point transients” with fresh alignment statistics and an innovative Earth’s-shadow control test. Show Notes • University of Toronto — OncoGAN / Synthetic Cancer Genomes (Cell Genomics) • NEJM — PRIMA (PRIMAvera) Wireless Sub-Retinal Implant Trial for Geographic Atrophy • Palomar POSS-I Plates — Multi-Point Transient Analysis (IOP PASP Paper) • Palomar Alignment vs Earth’s Shadow Control (Nature Scientific Reports 2025)

    2 h 4 min
Elenco completo (22)

Descrizione

From First Principles is a fast, funny, and rigorous breakdown of the biggest science stories of the week, hosted by Lester Nare and physicist Krishna Choudhary, PhD. We go past headlines into the actual mechanics: what happened, why it matters, and what everyone’s missing. Expect physics, space, AI, energy, biotech, and the occasional “wait… is that real?” story. If you’re curious, skeptical, and you like learning in public — you’re in the right place.

Informazioni

  • Creatore
    Krishna Choudhary and Lester Nare
  • Anni di attività
    2025 - 2026
  • Puntate
    22
  • Classificazione
    Contenuti espliciti
  • Copyright
    © Krishna Choudhary and Lester Nare
  • Sito web del podcast
    From First Principles

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