My father retired at 65 years old.

My father retired at the age of 65.

Source: Tatoeba

It takes 165 years for Neptune to orbit around the sun.

Source: Tatoeba

The earth makes one revolution around the sun in about 365 days.

Source: Tatoeba

At present there are about 31 million Americans over the age of sixty-five.

Source: Tatoeba