The story of our atoms

Observe, then explore further

The general-audience lesson distinguishes the first nuclei, stellar transformations and gas recycling. The second explains massive stellar cores, the iron–nickel limit and slow or rapid neutron captures.

Play, pause, sliders and enlargement reuse the tutorial controls. The film drives the same experiments. Sizes, quantities and durations are pedagogical, without nuclear-yield calculations.

Text and references distinguish AGB giants, Type Ia supernovae, core collapse and neutron-star mergers. Clusters are groupings that record enrichment, not an additional nuclear reaction.