They're two separate journals: * https://en.wikipedia.org/wiki/Astrobiology_(journal) https://en.wikipedia.org/wiki/Astrobiology_(journal) * https://en.wikipe

They're two separate journals: * https://en.wikipedia.org/wiki/Astrobiology_(journal) https://en.wikipedia.org/wiki/Astrobiology_(journal) * https://en.wikipedia.org/wiki/International_Journal_of_Astrobiology https://en.wikipedia.org/wiki/International_Journal_of_Astro... You're not the first to be confused :) The first line of each Wikipedia article is "Not to be confused with [the other journal]."