In Memoriam

Friedrich (“Fred”) Begemann passed away on May 11, 2018, at the age of 90. Begemann was the director of the Isotope Cosmology Department at the... Read more
Dr. Christine Floss died unexpectedly at her home in St. Louis, Missouri, on April 19, 2018, at age 56. Floss was a research professor in the Department of... Read more
Ian Stewart McCallum, geologist and professor emeritus at the University of Washington, Seattle, died peacefully of liver cancer on May 4, 2018, surrounded by... Read more
Astronomer Nancy Roman, the first woman to hold a senior leadership position at NASA, died on December 25 at the age of 93. After receiving her doctorate in... Read more