THE AGES OF THE GLOBULAR-CLUSTERS

The recent results for the relation between M(V) and [Fe/H] for RR Lyrae variables and horizontal branch stars are reviewed: < M(V)(RR) > = 0.1 5[Fe/H] + 1.08. If [O/Fe] = 0.3, the oldest clusters' ages approach 20 Gyrs, and the the most metal-poor clusters are older than the most metal-rich by several Gyrs. If [O/Fe] is-proportional-to -0.4[Fe/H], the most metal-poor clusters have ages of about 14 Gyrs and the most metal-rich clusters are not much younger. In both cases, there are age spreads among the intermediate metallicity clusters of up to 6 Gyrs.