Nobel laureate Jack Steinberger died on Dec. 12 at the age of 99. Steinberger was the one of the discoverers, along with Leon Lederman and Mel Schwartz, of two neutrinos who together won the 1988 Nobel Prize for that work. Theirs was the first accelerator-based neutrino experiment, the direct ancestor of the Fermilab neutrino program. Read about Steinberger’s legacy in The New York Times, The Washington Post and UChicago News. Peter Cooper is a Fermilab scientist emeritus.