Nicholas Evans is Distinguished Professor of Linguistics at the Australian National University. He investigates linguistic diversity and what this tells us about the nature of language, culture, deep history, and human creativity. He has carried out extensive fieldwork in Northern Australia (Kayardild, Bininj Kunwok, Dalabon, Iwaidja) and Papua New Guinea (Nen, Idi); his interests range from questions of grammar-writing, linguistic typology, and translation to historical linguistics. A member of the Australian Academy of the Humanities, the Australian Social Sciences Academy and the British Academy, he has been awarded an inaugural Anneliese Maier Forschungspreis, and a Ken Hale Award from the Linguistics Society of America. Sebastian Fedden is Professor of Linguistics at the Université Sorbonne Nouvelle in Paris and is affiliated with the Ludwig-Maximilians-Universität in Munich and the University of Surrey. He is a typologist with a specialization in morphology and Papuan languages and linguistics. His interests span linguistic diversity, the relationship between language, mind and culture, and grammar writing. He has carried out fieldwork in Papua New Guinea (on Mian) and Indonesia (on languages of Alor and Pantar). His grammar of Mian, published in 2011, won the von der Gabelentz Award of the Association for Linguistic Typology (ALT) for the best published grammar from 2009 to 2012.