This article presents recent research results in mental chronometry and neuroimaging that support the coexistence of multiple conceptions. It then presents and elaborates on six possible implications for an adherence to the coexistence claim within the context of scientific conceptual learning: (1) stop the war on misconceptions; (2) use a different chronology for students with lower background knowledge; (3) give cognitive conflict a new function; (4) avoid personal prejudice; (5) reaffirm the importance of the durability of "change"; and (6) teach science as early on as possible. A discussion of these implications and a biology-based analogy about conceptual understanding is also proposed.