A most terrible loss: my dear friend and mentor, Freeman Dyson February 28, 2020 Kristen Ghodsee Freeman Dyson and Kristen Ghodsee in 2011 Freeman Dyson and Kristen Ghodsee in October 2016 Kristen Ghodsee with Freeman Dyson in March 2019 My last meeting with Freeman on November 3, 2019