I thank Tim Elliott for getting me into this project and for all the support he provided during the writing and production of this article. Jeroen Van Hunen and Chris Hawkesworth both reviewed large parts of early drafts and provided many useful comments and suggestions. In no particular order, I thank Jean-François Moyen, Aaron Cavosie, Oliver Jagoutz, Hugh Rollinson, Kent Condie, Bruno Dhiume, Jeff Vervoort, Catherine Chauvel, Tracy Rushmer, Eric Ferré, Jeremy Richard, Mike Brown, Susan Mahlburg-Kay and Marion Garçon who helped by providing ideas, figures, references and other material that I was missing. I also sincerely thank Marie-Aude Hulshoff...

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