Richard SimaWashington Post·1 Nov, 2026 05:00 PM6 mins to readNZ Herald Morning Headlines | Monday, November 2, 2026. Politicians prepare for the NZ Election this week. Video / NZ HeraldResearcher Ron Petersen says there are simple things we can all do for healthier cognitive ageing.For more than 50 years, Ron Petersen has studied healthy ageing, cognition and dementia. Petersen’s research established the concept of mild cognitive impairment, which lies between healthy cognitive ageing and dementia. This idea changed
At 80, he’s a top dementia expert. Here’s how he keeps his brain healthy
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