Hasok Chang is the Hans Rausing Professor of History and Philosophy of Science at the University of Cambridge, and a Fellow of Clare Hall.  Previously he taught for 15 years at University College London, after receiving his PhD in Philosophy at Stanford University following an undergraduate degree at the California Institute of Technology.  He is the author of Is Water H₂O? Evidence, Realism and Pluralism (Springer, 2012), winner of the 2013 Fernando Gil International Prize; Inventing Temperature: Measurement and Scientific Progress (Oxford University Press, 2004), joint winner of the 2006 Lakatos Award; and Realism for Realistic People: A New Pragmatist Philosophy of Science (Cambridge University Press, 2022).  He is also co-editor (with Catherine Jackson) of An Element of Controversy: The Life of Chlorine in Science, Medicine, Technology and War (British Society for the History of Science, 2007), a collection of original work by undergraduate students at University College London.  He is a co-founder of the Society for Philosophy of Science in Practice (SPSP), and the Committee for Integrated History and Philosophy of Science.  He was the President of the British Society for the History of Science from 2012 to 2014.

Jenann Ismael is the William H. Miller III Professor of Philosophy at Johns Hopkins University and co-founder of the Natural Philosophy Forum (https://www.naturalphilosophyhopkins.org/). She is a philosopher of physics, who also thinks very broadly about what the universe is like and how we fit into it.  She’s written four books and many articles about topics including time and space, about symmetry and the laws of nature, about the foundations of quantum mechanics, about causation and probability, about the self and about free will.