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Acknowledgments Luı́sa V. Lopes and David Blum are grateful to all the colleagues who kindly accepted to contribute to this book. Our aim was to be inclusive and thorough on the selection of themes and contributors. Some fundamental scientists in the field originally invited could not contribute at this stage, due to prior commitments. Our words of friendship and admiration to them that we, nevertheless, tried to honor along these pages. We also want to express our gratitude to our lab members, students, and colleagues that over the years have challenged our views of science and pushed us forward. xvii Acknowledgments