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I review the main features and some of the theoretical attempts to explain the excess around an invariant mass of 750 GeV seen in 2015 at the LHC in the diphoton channel. As this hint to new physics has now all but disappeared from the higherluminosity 2016 data, the statistical analysis nicely illustrates why only a high level of significance can be trusted in a discovery. The various explanations that has been suggested remain interesting examples of our current understanding of physicsdoi:10.1051/epjconf/201612900001 fatcat:2atnu6fhr5bqfpgmizgv4dk54a