In 2001 I published a paper in Icarus entitled "An Estimate of the Age Distribution of Terrestrial Planets in the Universe: Quantifying Metallicity as a Selection Effect" (Lineweaver, 2001, Icarus, 151, 307-313. Since then, the observational ingredients to make this estimate have markedly improved. For example the star formation rate as a function of redshift is significantly different and more precise than the one I used in 2001. Also, the relationship between host star metallity and planet formation is also better understood. The project begins by reading my 2001 paper and then compiling the new observational ingredients to get a new estimate of the age distribution of terrestrial planets in the Universe.