  Recent experiments on production of Lambda-Lambda hypernuclei have renewed
interest in extracting the Lambda-Lambda interaction from the few events
identified since the inception of this field forty years ago. Few-body
calculations relating to this issue are reviewed, particularly with respect to
the possibility that A=4 marks the onset of Lambda-Lambda binding in nuclei.
The Nijmegen soft-core model potentials NSC97 qualitatively agree with the
strength of the Lambda-Lambda interaction deduced from the newly determined
binding energy of Lambda-Lambda-6He. Applying the extended NSC97 model to
stranger nuclear systems suggests that A=6 marks the onset of Xi binding, with
a particle stable Lambda-Xi-6He, and that strange hadronic matter is robustly
bound.
