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I shall discuss several features for ultra-cold collisions between two spin-1/2 atoms with isotropic spin-orbit coupling(SOC)of the Rashba type.Regardless of how weak the SOC may be,at sufficiently low energies the ubiquitous low energy Wigner threshold behavior is changed and its modified forms are given for ground state neutral atoms.The particles are found to scatter preferentially into the lower-energy helicity states due to the breaking of parity conservation.This latter point establishes interaction with SOC as one mechanism for the spontaneous emergence of handedness.The new features we find highlight exciting opportunities for atomic quantum gases with SOC.