Centauri Dreams covered this point well:<p>&gt; Working with Alak Ray (Tata Institute of Fundamental Research, Mumbai), Di Stefano points out that we have found low-metallicity stars known to have planets elsewhere in the galaxy. And while we can couple the occurrence of Jupiter-class planets with stars that have higher metallicity, there seems to be no such correlation when we’re dealing with smaller, rocky worlds like the Earth. Perhaps, then, we shouldn’t dismiss planets in globular clusters.<p><a href="http:&#x2F;&#x2F;www.centauri-dreams.org&#x2F;?p=34775" rel="nofollow">http:&#x2F;&#x2F;www.centauri-dreams.org&#x2F;?p=34775</a>