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From First Principles

From First Principles

Di: Krishna Choudhary and Lester Nare
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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.Krishna Choudhary and Lester Nare Scienza
Episodi
  • Nobel Prize 2026: The Science Gets Stranger

    Nobel Prize 2026: The Science Gets Stranger
    Oct 16 2026

    Can light restore aspects of sight? Can recalling a cold experience change an animal's metabolism? And what can ghost particles and mirror-image molecules tell us about the universe?

    Lester Nare and Krishna Choudhary follow up on our 2026 Nobel Prize episodes with research building on optogenetics, IceCube and molecular handedness. We unpack an early human vision-restoration trial, cold-memory experiments in mice, cosmic neutrino flavors, and a tiny electrical sensor for distinguishing left- and right-handed amino acids.

    Plus: how the Nobels work, our follow-up on the Nobel chemistry illustration, a brief look at neutrino Earth tomography, and why fundamental research matters. Which discovery would you like us to explore next?

    CHAPTERS
    00:00 Cold open: memory, neutrinos and mirror molecules
    00:28 Hello Internet and how the Nobels work
    04:32 Optogenetics recap
    10:23 Restoring aspects of vision
    25:43 Controlling movement in worms
    29:31 Cold memories and metabolism
    41:07 Memory, trauma and ethical questions
    45:44 FFP housekeeping
    48:17 IceCube recap
    56:23 Measuring cosmic neutrino flavors
    1:10:30 A brief look at neutrino Earth tomography
    1:12:20 Why fundamental physics matters
    1:26:58 Chemistry and molecular handedness
    1:29:08 Correcting the Nobel illustration
    1:39:30 Measuring chirality in tiny samples
    1:46:42 Testing the sensor on meteorite and desert samples
    1:51:22 Why these questions matter
    1:57:20 Closing thoughts and signoff

    RESEARCH & FURTHER READING
    Optogenetic therapy for visual function (NEJM, 2026):
    https://doi.org/10.1056/NEJMoa2602215

    Cold memories and thermoregulation (Nature, 2025):
    https://doi.org/10.1038/s41586-025-08902-6

    Three-flavor composition of cosmic neutrinos (PRL, 2026):
    https://doi.org/10.1103/vntd-m133

    Chiral discrimination in meteorite and desert soil extracts (Nature Communications, 2026):
    https://doi.org/10.1038/s41467-026-77947-6

    Further reading, briefly mentioned: neutrino Earth tomography (preprint):
    https://arxiv.org/abs/2607.02644

    EDITORIAL NOTES
    The vision trial was small and exploratory. The cold-memory findings discussed are from mice.

    On-screen clarifications:
    16:53 Both eyes were profoundly visually impaired; the worse-seeing eye was treated.
    19:57 The untreated eye was patched during testing, not a normal-vision control.
    54:41 Neutrino event rates depend on energy and selection, not just detector volume.
    1:05:47 Flavor identification efficiency is distinct from interaction probability; both depend on energy.
    1:13:35 Other astronomy-related Nobels include 2017 (LIGO) and 2019 (cosmology/exoplanets).
    1:18:00 The LHC at CERN enabled the Higgs discovery; CERN itself was founded in 1954.
    1:44:25 Both enantiomers produce current signals; waveform features distinguish them.
    1:46:42 Murchison is a meteorite. Diego de Almagro and North of Antofagasta are soil sites.
    1:47:40 The sensor study reports mixed agreement and limitations, not uniformly negative results.
    1:49:00 Phobos is a Martian moon; a captured-asteroid origin is a hypothesis.

    WATCH & LISTEN
    Full video: https://youtu.be/C9K6onZxyN4
    Episode notes: https://ffppod.com/episodes/ep64
    Follow @FFPPod on Instagram, TikTok, X and Facebook.

    Breaking down science news so it makes sense to curious people everywhere.
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    1 ora e 59 min
  • Nobel Prize in Chemistry 2026 Explained: Mirror Molecules (EP 63)

    Nobel Prize in Chemistry 2026 Explained: Mirror Molecules (EP 63)
    Oct 7 2026

    Why does life favor one molecular mirror image? The 2026 Nobel Prize in Chemistry honors Henri B. Kagan and Kenso Soai for nonlinear effects and autocatalysis in asymmetric organic synthesis.

    Lester Nare and Krishna Choudhary unpack the science from first principles: chirality, Pasteur's crystals, enantiomeric excess, and how a tiny imbalance can grow into an overwhelming preference for one molecular hand.

    We connect Kagan's catalyst discoveries and the Soai reaction to medicines, the origins of biological handedness, and the serious concerns around hypothetical mirror life. Plus: symmetry in physics, Frances Oldham Kelsey and thalidomide, and our interpretation of a Nobel illustration.

    CHAPTERS
    00:00 Why life has a molecular handedness
    01:33 Hello Internet
    02:49 The 2026 Chemistry laureates
    06:24 Chirality and mirror-image molecules
    12:10 Pasteur and the history of handedness
    19:36 Why is life's chemistry one-handed?
    24:35 Frank and the origin-of-life puzzle
    29:14 Enantiomeric excess explained
    30:30 Kagan and nonlinear effects
    38:58 FFP and symmetry in physics
    42:20 Soai and asymmetric autocatalysis
    51:28 Why chirality matters for medicine
    58:21 What this does and does not explain about life
    1:00:25 Mirror life and biological risk
    1:10:37 Examining the Nobel illustration
    1:14:10 Recap and Nobel week reflections

    RESEARCH & FURTHER READING
    Original papers and supporting context:
    Frank's model (1953): https://doi.org/10.1016/0006-3002(53)90082-1
    Puchot, Kagan et al. (1986): https://doi.org/10.1021/ja00269a036
    Soai et al. (1995): https://doi.org/10.1038/378767a0
    Sato et al., amplification (2003): https://doi.org/10.1002/anie.200390105
    Mirror-life risks (2024): https://doi.org/10.1126/science.ads9158
    Nobel announcement: https://www.nobelprize.org/prizes/chemistry/2026/press-release/

    EDITORIAL NOTES
    Intro: the 50:50 example describes an unbiased synthesis, not all chemistry. The Soai reaction is a clue to amplification, not proof of how life began.

    On-screen clarifications:
    04:38 B-DNA is right-handed; Z-DNA can form a left-handed helix.
    13:56 Pasteur separated sodium ammonium tartrate crystals.
    18:48 L/D configuration does not specify optical rotation.
    19:10 Proteins mainly use L-amino acids; DNA/RNA use D-sugars.
    22:55 Mentos mainly triggers CO2 bubble nucleation.
    27:18 Asymmetric catalysis and autocatalysis are distinct.
    34:07 0.25 × 0.25 = 0.0625 = 6.25%.
    36:31 Inactive mixed catalyst pairs are a simplified model.
    37:55 The normalized product-ratio curve need not be parabolic.
    42:04 Wu: preferential emission opposite spin; antineutrinos also emitted.
    45:30 5-pyrimidyl alkanol; an alkanol is an alcohol.
    47:10 The tiny-imbalance result is Sato et al. (2003), cited above.
    47:40 A demonstration of symmetry breaking by asymmetric autocatalysis.
    49:09 Above 99.5% ee means above 99.75% majority form, not exactly 100%.
    49:57 0.00005% excess is 1 part in 2,000,000.
    52:44 Thalidomide enantiomers interconvert in the body.
    53:36 Merrell applied in the U.S.; Kelsey withheld approval. Trial exposure occurred.
    1:02:09 Mirror-life catastrophe is a serious risk, not an observed outcome.
    1:03:28 Antibodies are adaptive immunity, not innate immunity.
    1:03:53 Impaired recognition does not mean proven total immune invisibility.
    1:04:27 Some treatments might work; ecosystem protection is very difficult.
    1:04:56 No reproducing mirror organism has been reported.
    1:09:19 Chimeras and genetic modification are not interchangeable.
    1:10:37 The Nobel-diagram critique is our interpretation, not an official correction.
    1:11:51 Solid wedge: toward; hashed wedge: away; ordinary line: neither.

    WATCH & FOLLOW
    Full video: https://youtu.be/Wdapv1hFT4w
    Episode notes: https://ffppod.com/episodes/ep63
    Follow @FFPPod on Instagram, TikTok, X and Facebook.

    Breaking down science news so it makes sense to curious people everywhere.
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    1 ora e 21 min
  • Nobel Prize in Physics 2026 Explained: IceCube & Neutrinos

    Nobel Prize in Physics 2026 Explained: IceCube & Neutrinos
    Oct 6 2026
    Why build a telescope inside a billion tons of Antarctic ice? The 2026 Nobel Prize in Physics recognizes Francis Halzen's work on IceCube and the discovery of high-energy neutrinos from the cosmos.In Episode 62 of From First Principles, Lester Nare and Krishna Choudhary explain neutrinos from the ground up: why these elusive particles make powerful cosmic messengers, how faint flashes of Cherenkov light reveal their interactions, and why detecting them requires an observatory buried deep beneath the South Pole.We follow the path from beta decay and the first neutrino experiments to AMANDA, IceCube's construction, the 2013 astrophysical breakthrough, a distant blazar, and a neutrino map of the Milky Way. Along the way: cosmic rays, the Oh-My-God particle, tracks versus cascades, and the international collaboration behind the discovery.CHAPTERS00:00 Hunting ghost particles beneath Antarctica01:16 Hello Internet and Nobel Prize05:30 What are neutrinos?10:00 Neutrinos as cosmic messengers15:02 The Oh-My-God particle16:21 Cosmic-ray energies19:07 Cosmic particle accelerators22:28 Why look for neutrinos?25:52 How to detect a neutrino29:23 Cherenkov light33:13 Building a neutrino observatory37:17 From Antarctic ice to AMANDA42:21 Building IceCube44:59 Reading tracks and cascades49:30 Backgrounds and the 2013 discovery52:46 Tracing cosmic neutrino sources54:16 Mapping the Milky Way58:23 IceCube collaboration and Gen21:01:05 Closing and Nobel weekRESEARCH & FURTHER READINGAMANDA in Antarctic ice (2001): https://doi.org/10.1038/35068509IceCube detector and instrumentation (2017): https://doi.org/10.1088/1748-0221/12/03/P03012First PeV neutrinos (2013): https://doi.org/10.1103/PhysRevLett.111.021103Astrophysical neutrino evidence (2013): https://doi.org/10.1126/science.1242856Blazar TXS 0506+056 (2018): https://doi.org/10.1126/science.aat1378Archival blazar neutrino emission (2018): https://doi.org/10.1126/science.aat2890Milky Way neutrino map (2023): https://doi.org/10.1126/science.adc9818Gamma-ray burst constraints (2012): https://doi.org/10.1038/nature11068IceCube overview: https://icecube.wisc.edu/science/icecube/EDITORIAL NOTESIntro: the 2013 breakthrough was high-energy astrophysical neutrinos. Lower-energy supernova neutrinos were detected in 1987.On-screen clarifications:06:45 Beta-minus decay produces a proton, electron and electron antineutrino.11:10 Davis studied solar neutrinos; Koshiba's team detected SN 1987A neutrinos.17:50 The cosmic-ray knee and ankle are not fixed distance boundaries.19:38 Required accelerator size depends on magnetic-field strength.24:18 Ground-based telescopes also detect gamma rays through air showers.27:48 W interactions produce charged leptons; Z scattering preserves neutrino flavor.34:06 The underwater concept dates to 1960; DUMAND developed in the 1970s.36:09 Baikal holds about one-fifth of unfrozen surface freshwater.38:53 Earth filters muons but also absorbs many very-high-energy neutrinos.41:26 Pressure converts air bubbles into clathrates, reducing light scattering.42:28 Construction finished in December 2010; full operations began in May 2011.44:27 Sensors are DOMs; DeepCore is a densely instrumented detector region.45:47 Timing gives direction; light yield and pattern help estimate energy.49:44 Upgoing events can still be atmospheric neutrinos.53:12 TXS 0506+056 is about 3.7 billion light-years away.56:38 Long GRBs often involve collapsing stars; short GRBs often involve mergers.WATCH & FOLLOWFull video: https://youtu.be/eMahxeBj5k0Episode notes: https://ffppod.com/episodes/ep62Medicine Nobel explained: https://youtu.be/PKAYqhy8xf8Follow @FFPPod on Instagram, TikTok, X and Facebook.From First Principles: Breaking down science news so it makes sense to curious people everywhere.
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    1 ora e 2 min
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