I read an article "The Wisdom Years".
The main topic of the textbook was mental. The book said optimism, gratitude, proactive, and to embrace learning and change were keys to get ourselves to live longer. I thought those factors were like advice and the secret of staying young.
The article told about what has been happening ( and what is going to happen) in the world. That is "aging and a decreasing number of children." The article reported the facts and the expectancy with data.
Advice and facts are not the same things, so I think the textbook and the article showed different points of aging.
