Milken Institute Sep 11 2025 Today, Breakthrough Discoveries for thriving with Bipolar Disorder (BD²) announced the opening of a fourth round of funding opportunities for the Discovery Research program. BD² invites scientists across all disciplines to apply for up to $4.5 million per grant. Successful teams will undertake groundbreaking research into the genetic, molecular, cellular, circuit, and behavioral mechanisms of bipolar disorder, especially applications that address the following: