Men­tal­ly stim­u­lat­ing jobs keep your mind sharp post-retire­ment (Tech Times): “If you want to stay sharp in your gold­en years, it’s best to get the hard yards in ear­ly — a new study has found that peo­ple with men­tal­ly demand­ing jobs fare bet­ter in the years after retirement.…Mental acu­ity and mem­o­ry reten­tion was found to be…