The show has had several different site in its life span.

For example technology has a short life span and can be considered old after only one year.

Their life span is usually between 5 to 7 years.

Most have a life span of 12 to 15 years.

Total life span is one to two years on average.

Its life span is up to 15 to 20 or even 25 years.

The life span is thought to be about a year.

He had a very short life span of just 34 years.

The expected life span was even greater for those who were older.

I have no idea what their life span may be.