Connections between many-body chaos and ergodicity form the basis of statistical mechanics. Starting with an overview of recent interests in this area, I shall discuss our numerical results characterising spatio-temporal signatures of chaos in spin systems and point out their possible quantitative connection to measures of transport such as diffusion coefficients. I shall discuss how the physics of frustration in classical spin systems help retain the signatures of chaos even at low temperatures.
 Light-cone spreading of perturbations and the butterfly effect in a classical spin chain, Avijit Das, Saurish Chakrabarty, Abhishek Dhar, Anupam Kundu, David A. Huse, Roderich Moessner, Samriddhi Sankar Ray, Subhro Bhattacharjee, Physical Review Letters 121, 024101 (2018)
 Temperature dependence of butterfly effect in a classical many-body system , Thomas Bilitewski, Subhro Bhattacharjee, Roderich Moessner, arXiv: 1808.02054