About 30,000 Americans suffer from the disease, and their average life span is 28 years.

What is the average life span of even your biggest star?

The largest group of the students, 33 percent, thought the average life span would be more than 100 years.

One in 10, or 11 percent, said the average life span would be more than 125 years.

The average life span for a victim of the disease is 28 years.

The average life span of a glass wall depends on where you are.

It has simply cut the average human life span down to about thirty years.

The 19th and 20th century saw the most dramatic rise in average life span.

The breed has an average life span of 10-13 years.

The average life span of this species is about 15 years.