Fred Gage from the Salk Institute in La Jolla, California, busted that myth in 2000 when he showed that even adults can grow new brain cells.

• 集体活动、猜字谜、编织和运动都有助于防止衰老，可见那句古语“脑子越用越灵，不用则钝”是有道理的。精神信仰，或积极向上的心态也不能被忽视。但这也因人而异。