Concatenation's earlier, annual print editions feature Gaia's columns between 1987 and 1997, but we regret that our supply has run out. (If desperate, copies do occasionally surface in the dealers room at the UK Eastercon SF convention among others.) In case you stumble across them, Gaia's articles have also appeared in a number science journals in the 1990s. Gaia is now getting on - around 5 billion years old some say - hence the column is not as regular as we would like but we hope that the annual perspective amuses and perhaps, occasionally, illuminates.
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