Episode 1.1 · 20 min

The Big Bang

How expansion and cooling transformed the early universe from a hot plasma into a transparent cosmos of atoms—and what its oldest light can tell us.

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Visual credits

15 sources

Visual sources include third-party material incorporated into custom animations. License information is reproduced from source records; an unrecorded license does not mean a work is public domain.

  • The Cosmic Microwave Background: temperature and polarisation

    ESA

  • Bontecou Lake Milky Way panorama

    Juliancolton

  • Scientific figure · source page 3

    Balkenhol et al.

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Map

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific image

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • View of the LHCb experiment in its underground cavern (image: CERN)

    CERN

  • image

    Springer Nature

  • image

    Springer Nature

  • Scientific figure · source page 6

    Kislitsyn et al.

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 24

    Aver et al.

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 4

    Particle Data Group

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific image

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Image of Act telescope

    ACT Collaboration

  • image acttemp

    ACT Collaboration

  • hep cosmology astrophysics 0 image

    Argonne National Laboratory

Animation design references 1 sources

These works informed the design of explanatory animations. A reference listed here is not necessarily reproduced on screen.

  • Scientific figure · source page 6

    Creator credit under review

    Figure or page excerpt cropped from the source publication.

Research references

Selected sources from the episode’s research and scientific figures.

  1. PDG 2026 reviews index ↗
  2. Balkenhol et al. 2026, arXiv:2512.10613v2 ↗
  3. LHCb, Nature 643 (2025) ↗
  4. LBT helium, arXiv:2601.22238 ↗
  5. LBT cosmological implications, arXiv:2601.22239 ↗
  6. BBN sensitivity atlas, arXiv:2603.22414v2 ↗
  7. Data-driven D/H prediction, arXiv:2604.16600 ↗
  8. Planck 2018 cosmological parameters ↗
  9. ACT DR6 maps, arXiv:2503.14451 ↗
  10. SPT-3G D1 v2 ↗
  11. https://lambda.gsfc.nasa.gov/product/cobe/firas_monopole_spect.html ↗
  12. https://www.esa.int/ESA_Multimedia/Images/2018/07/Planck_s_view_of_the_cosmic_microwave_background2 ↗
  13. https://act.princeton.edu/overview/act-dr6-science ↗
  14. PDG 2025 BBN review ↗
  15. J1332+0052 deuterium, arXiv:2401.12797 ↗
  16. PDG 2026 Big-Bang Cosmology ↗
  17. NASA John Mather Big Bang Q&A ↗
  18. NASA expansion explainer ↗
  19. ESO molecular CMB thermometer ↗
  20. SH0ES SMC anchor, arXiv:2404.08038 ↗
  21. DES supernova time dilation, arXiv:2406.05050 ↗
  22. Planck 2018 inflation constraints ↗
  23. BICEP/Keck + Planck PR4 ↗
  24. Simons Observatory expanded SAT forecast, arXiv:2512.15833 ↗
  25. Simons Observatory first-light site ↗
  26. PDG 2026 Big-Bang Nucleosynthesis ↗
  27. PDG 2026 Cosmic Microwave Background ↗
  28. CERN result page ↗
  29. arXiv:2509.16103 ↗
  30. RMP baryogenesis review ↗
  31. Miranda lithium model, arXiv:2508.09821 ↗
  32. NASA LAMBDA FIRAS products ↗
  33. ESA Planck CMB explainer ↗
  34. Duration of last scattering ↗
  35. https://esdcdoi.esac.esa.int/doi/html/data/astronomy/planck/CMB_Maps.html ↗
  36. https://lambda.gsfc.nasa.gov/product/wmap/current/ ↗

Music

  • Meditation From The Star Orion
    OctahedronMusic · Envato Elements

How this film was made

Created and editorially directed by Anders Lunde using a custom production system developed over six months. AI assists research, drafting, programming, and visual production; I review and edit the material and make the final editorial decisions. Narration uses text-to-speech. Visuals combine custom-built scientific animations, AI-generated reconstructions, and credited scientific imagery.

Generated reconstructions illustrate scientific interpretations. They are distinct from photographs, specimens, and measured data.

More about the creator and production →