WEF INSIGHT
World Economic Forum · Science & Future Series
When stars become life: the cosmic origins of biochemistry
Every atom in your body was forged in a dying star. New research is revealing how astrophysics and biochemistry are two chapters of the same story.
Astrophysics
Biochemistry
Astrobiology
Cosmic timeline — from bang to biology
13.8 billion years ago
Big Bang — hydrogen & helium only
The universe begins with the two lightest elements. No carbon, no oxygen, no possibility of life yet.
13–4 billion years ago
Stellar nucleosynthesis — the element factory
Massive stars fuse hydrogen into C, N, O, S, P — the scaffolding of every biomolecule. Supernova explosions scatter these elements across the galaxy.
4.6 billion years ago
Earth forms — delivery by meteorites & comets
The Late Heavy Bombardment delivers water and complex organic molecules. Carbonaceous chondrite meteorites carry amino acids, nucleobases, and sugars.
~3.8 billion years ago
First life — cosmic chemistry activates
Stellar UV radiation and cosmic rays power the first prebiotic reactions. The ocean becomes a biochemical reactor seeded by the cosmos.
Today
Astrobiology — searching for life beyond Earth
We scan exoplanet atmospheres for biosignatures (O₃, CH₄) and probe ocean moons like Europa and Enceladus for biochemistry in action.
Key figures
200+
Interstellar molecules detected
Organic compounds found in interstellar clouds, including glycine and simple sugars.
70+
Amino acids in one meteorite
The Murchison meteorite alone carries over 70 amino acids, many not found in living organisms.
5,000+
Exoplanets confirmed
Thousands of worlds screened for habitable zones and atmospheric biosignatures.
98%
Of your body's atoms were in stars
Hydrogen aside, virtually every atom in your body was synthesised in stellar interiors.
Where the building blocks of life come from
Biochemically relevant molecules detected in interstellar space
| Molecule | Formula | Biochemical role | Source |
|---|---|---|---|
| Glycine | NH₂CH₂COOH | Simplest amino acid | Meteorite |
| Formaldehyde | CH₂O | Sugar precursor | Interstellar cloud |
| Adenine | C₅H₅N₅ | DNA/RNA nucleobase | Meteorite |
| Ribose | C₅H₁₀O₅ | RNA backbone sugar | Meteorite |
| Acetaldehyde | CH₃CHO | Metabolic intermediate | Interstellar cloud |
| HCN | HCN | Amino acid synthesis precursor | Comet |
"Life is not a planetary accident — it is a predictable outcome of cosmic chemistry operating across billions of years and trillions of stars."
— Perspective shared at the WEF Global Future Council on Space TechnologiesTwo intersecting disciplines
Astrophysics provides
Elements Heavy atoms forged in stars
Energy Stellar radiation & UV
Delivery Comets & meteorites
Context Habitable zones
Biochemistry uses
C, N, O, P Molecular scaffolding
H₂O Universal solvent
Photons Photosynthesis fuel
Amino acids Protein synthesis
التسميات
SCIENCE-PLUS