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Article Contents

TITLE PAGE

1.INTRODUCTION

2.NUCLEOSYNTHESIS IN THE EARLY UNIVERSE

2.1.Weak Equilibrium and the ⁴He Abundance

2.2.Deuterium - The Ideal Baryometer

2.3.Helium-3 - Complicated Evolution

2.4.Lithium-7 - The Lithium Valley

3.FROM HERE AND NOW TO THERE AND THEN

3.1.Deuterium

3.2.Helium-4

3.3.Lithium-7

4.CONFRONTATION OF THEORY WITH DATA

4.1.Comparison of BBN with Non-BBN Baryon Density Estimates

5.COSMOLOGY CONSTRAINS PARTICLE PHYSICS

6.SUMMARY

REFERENCES