ABSTRACT: Einstein predicted in 1925 that an atomic gas, cooled to a sufficiently low temperature, would undergo a phase transition in which the atoms would collect into a single quantum state. Seventy years passed before refrigeration technology caught up with Einstein's theoretical vision and produced the first atomic Bose-Einstein condensate (BEC), as this macroscopically-occupied quantum state is known. The atoms in the condensate display stunning forms of collective behavior, including matter-wave interference and superfluidity. In this talk I will discuss results from an experimental system of binary Bose superfluids, created from a single condensate by a "spin-tip" pulse of resonant radiation. Once created the two superfluids interact with one another, forming transient and approximately periodic atomic density distributions that exhibit striking coaxial ring patterns. From the macroscopic superfluid behavior we can infer much about the nature of the underlying microscopic atomic collisions.