http://news.bbc.co.uk/1/hi/health/3794479.stm

The researchers also found that the bilingual volunteers were much less likely to suffer from the mental decline associated with old age.

"The bilinguals were more efficient at all ages tested and showed a slower rate of decline for some processes with aging," they said.

"It appears...that bilingualism helps to offset age-related losses."
Next time you're bored, learn a new language!

Fredi