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Article Contents

ABSTRACT

1.INTRODUCTION

2.THE STELLAR EVOLUTION CLOCK

2.1.Uncertainty in L^TO Due to Basic Stellar Physics Inputs

2.2.Uncertainty in L^TO Due to Additional Physics Usually ignored

2.3.Uncertainty in L^TO Due to Unconventional Physics

2.4.Uncertainty in L^TO Due to the Assumed Chemistry of Stars

2.5.Tests of Stellar Models

2.6. The First Estimates of Globular Cluster Ages

3.GLOBULAR CLUSTER DISTANCES

3.1.Subdwarf-Based Distances

3.2.Distances Based on RR Lyraes

4.SUMMARY

REFERENCES