From First Principles

Krishna Choudhary and Lester Nare
  • 4.9 (102)
  • SCIENCE
  • UPDATED WEEKLY

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. 1D AGO

    Can We Stop an Asteroid? The Physics Behind NASA’s DART Mission (EP. 30)

    Hosted by Lester Nare and Krishna Choudhary, this episode is a full deep dive on planetary defense. We break down NASA’s DART mission, why the goal was never to “blow up” an asteroid but to gently nudge it, and why the newest result is even bigger than the original headline: scientists can now directly detect that the Didymos–Dimorphos system changed not just locally, but in its heliocentric path around the Sun. Summary DART actually worked — not just by shortening Dimorphos’s local orbit around Didymos by 33 minutes, but by measurably changing the motion of the whole binary system around the Sun. Planetary defense is a measurement problem — the new result hinges on detecting a velocity shift of just 11 microns per second in an asteroid system moving tens of kilometers per second. Why ejecta matters — the impact transferred more momentum than the spacecraft carried in, thanks to debris blasting off the asteroid and boosting the total deflection. Why this matters for Earth — for the first time in our planet’s history, life on Earth may actually have the tools to alter its own cosmic fate.Support the show Donate: FFPod.com/donate Follow: @FFPod on X / Instagram / TikTok / Facebook Chapters 00:00 New single-story format 01:53 DART mission setup 18:26 Why the binary asteroid system matters 31:36 Measuring the heliocentric deflection 46:28 Planetary defense implications 53:37 OutroShow Notes DART heliocentric deflection result — Science Advances NASA DART mission overview ESA HERA mission

    54 min

  2. 5D AGO

    Astrobiology’s Biggest Survival Test + A Vaccine Against Everything? (EP. 29)

    Hosted by Lester Nare and Krishna Choudhary, this episode starts in astrobiology with a fresh experimental challenge to one of the biggest objections to lithopanspermia: can life actually survive the violence of being blasted off a planet by an asteroid impact? Then, after a packed Rundown, we pivot hard into immunology with a radical Stanford paper asking whether we could build one nasal vaccine that doesn’t target a specific pathogen at all—but instead makes the lung itself a stronger fortress against whatever shows up. Summary Lithopanspermia gets less crazy — a Johns Hopkins / PNAS Nexus study tests whether extremely resilient microbes can survive the initial shock of ejection from a planet, potentially closing the last major bottleneck in rock-to-rock transfer of life. The universal-vaccine idea — instead of training the adaptive immune system on one pathogen, Stanford asks whether the lung itself can be preconditioned to respond broadly and rapidly to many threats. The Rundown — AI for materials science, orbital nuclear conflict simulations, and other frontier stories the guys wanted to hit even without full deep dives. Support the showDonate: FFPod.com/donateFollow: @FFPod (X / Instagram / TikTok / Facebook) Show Notes Lithopanspermia / impact survival (PNAS Nexus, Johns Hopkins) https://academic.oup.com/pnasnexus/article/5/3/pgag018/8503064 Pathogen-agnostic nasal vaccine (Science, Stanford) https://www.science.org/doi/10.1126/science.aea1260

    2h 4m

  3. MAR 4

    Dark Galaxies, Fuzzy Dark Matter, and an Alzheimer’s Breakthrough (EP. 28)

    Hosted by Lester Nare and Krishna Choudhary, this episode has two main stories: an astrophysics update on a candidate “dark galaxy” in the Perseus Cluster (a halo that’s ~99.9% dark matter), and a major Alzheimer’s mechanism paper tracing how exercise protects the brain by repairing the blood–brain barrier—with an actionable drug-like path already emerging. Summary Candidate dark galaxy — Hubble + Euclid stacking and globular clusters reveal an ultra-faint halo that could test missing satellites and the cusp–core problem (and even “fuzzy dark matter”). Exercise → Alzheimer’s mechanism — UCSF links a liver enzyme (GPLD1) to BBB repair via TNAP regulation, plus an oral TNAP inhibitor (SBI-425) that mimics the effect in mice. Rundown — Rubin Observatory’s real-time alert engine, AI-accelerated magnet discovery, a climate-corrected Easter Island history, and the Boba-Kiki effect in baby chicks. Support the showDonate: FFPod.com/donateFollow: @FFPod (X / Instagram / TikTok / Facebook)

    1h 52m

  4. FEB 26

    Dream Engineering, the Proton Radius Puzzle, and an ALS Breakthrough (EP. 27)

    Hosted by Lester Nare and Krishna Choudhary, this episode has three main stories: interactive dream engineering (yes, two-way “communication” during lucid dreaming), the proton radius puzzle finally getting resolved by a precision lab measurement, and a sobering but hopeful look at ALS—including a breakthrough “ALS-in-a-dish” model that could finally make drug screening translate to humans. Summary Dream engineering — targeted cues + induced lucidity → dream-content biasing and measurable next-day performance gains.Proton radius puzzle — precision hydrogen spectroscopy resolves the decade-long discrepancy; normal hydrogen agrees with muonic hydrogen.ALS — a predictive iPSC motor-neuron model that correlates with patient survival and reveals a promising multi-drug synergy.Rundown — pulsar near the Milky Way center, AI decoding a Roman board game, hormones + evolution signals, and AI-in-the-loop protein engineering.Support the showDonate: FFPod.com/donateFollow: @FFPod (X / Instagram / TikTok / Facebook)

    2h 12m

  5. FEB 18

    Winter Olympics Deep Dive: Ice Physics, Performance Pressure, and Climate Change (EP. 26)

    Hosted by Lester Nare and Krishna Choudhary, this episode is a Winter Olympics deep dive from first principles—physics, neuroscience, and climate science in one ride. • Why ice is slippery: the “water layer” story is incomplete—new nanoscale measurements suggest a far more viscous, thicker interfacial film than textbook intuition.• Choking under pressure: how high stakes can disrupt neural control—reward signals can push brain states out of the “optimal zone.”• Climate change vs winter sports: why artificial snow has limits, why some legacy venues may become unreliable, and what “snow farming” is trying to solve.• Rundown: AI doing physics proofs, cat vocalizations, immune epigenetics, origin-of-life genetics, and an “impossible” exoplanet system. Support the show: FFPpod.com/donateFollow: @FFPod (X / Instagram / TikTok / Facebook) 00:00 Intro00:32 Episode setup02:15 Why is ice slippery?33:23 Rundown + housekeeping + donate01:09:11 Choking under pressure (neuroscience)01:32:32 Climate change & the Winter Olympics + potpourri01:43:47 Wrap-up + closing

    1h 50m

  6. FEB 10

    Plants, Quantum Sensors, and Predicting Cancer Evolution (EP. 25)

    Hosted by Lester Nare and Krishna Choudhary, this episode jumps from plant biochemistry to quantum metrology to cancer evolution. We start with a University of York breakthrough that solves a ~50-year mystery in alkaloid biosynthesis—identifying the “missing” enzyme behind a key asymmetric step plants use to build powerful defensive (and pharmaceutically useful) molecules. Then we go deep on quantum sensing with entangled atomic clouds, showing how correlated measurements can beat the standard quantum limit. Finally, we close with ALFA-K, a new tool that maps local fitness landscapes to predict how aneuploid cancers may evolve under pressure from therapy. Summary Plants making medicines — the “phantom enzyme” in alkaloid biosynthesis and why solving this pathway matters for scalable drug production.Quantum measurements with entangled atom clouds — squeezed/entangled states, noise reduction, and why correlations unlock better sensing.Predicting cancer evolution — ALFA-K and measurable fitness landscapes for aneuploidy-driven trajectories under treatment.Show Notes Story 1 — Plant alkaloid biosynthesis (University of York)Paper — New PhytologistStory 2 — Quantum measurements with entangled atomic clouds (University of Basel)Paper — ScienceStory 3 — Alpha-K (Moffitt Cancer Center)Paper — Nature Communications

    1h 49m

  7. FEB 4

    Artemis II, Apollo, and the Physics of Going Back to the Moon (EP. 24)

    Hosted by Lester Nare and Krishna Choudhary, this episode is a full-spectrum moonshot: why Artemis II matters, how the mission actually works (SLS, Orion, translunar injection, free-return trajectories), and a first-principles teardown of the most common Apollo “hoax” claims—Van Allen belts, waving flags, shadows, and “why aren’t there stars?” We also run a quick Rundown of wild science headlines (ancient cave art, elevation-dependent warming, dogs and vocabulary, and peptide bonds in deep space), before coming back to the core question: what it takes to send humans safely around the Moon—again. Summary Artemis II mission profile — what “free return” means, why TLI timing matters, and what Orion is doing in high Earth orbit before the Moon.SLS vs Saturn V — the engineering and risk trade-offs behind modern human-rated heavy lift.Apollo myths, explained — radiation belts, camera exposure physics, and why the “flag,” “shadows,” and “no stars” arguments don’t survive basic mechanics and optics.Proof Apollo happened — retroreflectors, orbital imagery, and the reality that the world was watching.Show Notes NASA Artemis ProgramNASA Orion SpacecraftNASA Space Launch System (SLS)NASA Apollo 11 Mission Overview

    1h 10m

  8. JAN 27

    JWST’s “Little Red Dots,” TimeVaults, and the Dawn of Math (EP. 23)

    Hosted by Lester Nare and Krishna Choudhary, this episode runs from JWST’s “Little Red Dots” (and what they imply about early supermassive black holes), to a TimeVault method for recording gene expression over time, to 8,000-year-old Halaf pottery that may encode geometric sequences — plus a quick Cloud9 follow-up on the “starless dark-matter halo” debate. Summary JWST’s Little Red Dots — why these compact red sources don’t behave like normal galaxies or quasars, and how an ionized-gas “cocoon” model could reconcile the data.TimeVaults — a genetically encoded “vault” that protects RNA long enough to capture time-series biology, not just snapshots.Math before numbers — Halafian motifs that appear to follow geometric sequences (4–8–16–32–64) and what that suggests about early cognition.Cloud9 update — what new data would actually settle RELHIC vs. “dark galaxy.” Show Notes JWST “Little Red Dots” (Nature)TimeVaults (Science)Halaf pottery + prehistoric mathematical thinking (Journal of World Prehistory)Cloud9 / RELHIC follow-up (arXiv)

    1h 41m
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4.9
out of 5
102 Ratings

About

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.

Information

  • Creator
    Krishna Choudhary and Lester Nare
  • Years Active
    2025 - 2026
  • Episodes
    30
  • Rating
    Explicit
  • Copyright
    © Krishna Choudhary and Lester Nare
  • Show Website
    From First Principles

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