The article discusses research being done on the molecular mechanisms in haematopoietic stem cells (HSC) ageing. It references the study "A canonical to non-canonical Wnt signalling switch in haematopoietic stem-cell ageing," by M. C. Florian and colleagues in the 2013 issue of the journal "Nature." It mentions that the increased WNT5A expression and switch from canonical to non-canonical WNT signalling results to HSC ageing.