Scientists have discovered the best types of activities to lower your risk of Alzheimer's by nearly 40%. Research has outlined how certain activities that keep the brain active through lifelong learning, and can prevent cognitive decline. US experts examined data for 1,939 people with an average age of 80 who did not have dementia at the start of the study and then tracked their thinking skills for eight years. When focusing on participants’ childhoods, researchers looked at whether people had