Chapter 05 of 5
Biological Stardust
Tracing the path from stellar debris to the atoms in human DNA and blood.
- Lineage
Universal Chemistry
Every atom in your body, except for primordial hydrogen, was forged inside a star or in its violent death.
- Composition
The Stellar Majority
Oxygen, carbon, and nitrogen make up about 93% of human mass. These are the direct products of stellar fusion cycles.
- Mechanism
Stellar Enrichment
Stars eject their heavy elements through solar winds and supernova explosions, seeding the interstellar medium with life's raw materials.
17 more cards in this chapter
Could you answer this?
Which component of the human body consists of atoms that primarily date back to the Big Bang rather than stellar fusion?
✨ Stellar Nucleosynthesis
- 01The Coulomb BarrierWhy atoms resist fusing and the extreme pressures needed to force them together.
- 02Helium and the Triple-AlphaHow stars bridge the 'mass gap' to create carbon through rare, high-heat collisions.
- 03The Iron Dead-EndWhy fusing iron is a star's death sentence, leading to immediate core collapse.
- 04R-Process and SupernovaeThe violent birth of heavy metals like gold and uranium in cosmic cataclysms.
- 05Biological StardustTracing the path from stellar debris to the atoms in human DNA and blood.