The International Society for Extremophiles, and the Hellenic National Initiative “Mikrobiokosmos” are pleased to announce the 13th International Congress on Extremophiles (Extremophiles2020). The venue will be held at the Club Hotel Casino Loutraki (https://www.clubhotelloutraki.gr/hotel/en/) from the 13th to 17th of September, 2020, in Loutraki. For more information please visit the Congress official site at https://www.extremophiles2020.org/.