The Defense Advanced Research Projects Agency (DARPA) Defense Sciences Office (DSO) is sponsoring a Discover DSO Day (D3) event to (1) familiarize participants with DSO’s mission, (2) promote understanding of DSO funding opportunities, and (3) facilitate discussions with DSO program managers. The event will be held in person only on April 23-24, 2025, in Chicago, IL. Advance registration is required for all individuals attending. Note that all deadlines and times listed on the registration website are Eastern Time.