The age of the child has been estimated to be between 9 and 10 years.

Its age is estimated to be less than 1000 years.

He had very little idea of how the baby's age could have been estimated.

Its age has been estimated to about 220 million years.

Its age is estimated to be between 3 and 8 million years.

Their age is estimated to be between 500,000 and 300,000 years old.

The age of the system has been estimated at around 230 million years.

His age is estimated to be over 60 at present.

Its age is estimated to be from 200 to 300 million years.

Its age is estimated at less than a billion years.