Spanish scientists have invented such a test that they say will (3) how much longer you will live. The $700 test measures the length of telomeres in our DNA. Telomeres control how often our cells divide to make new ones and are thus (4) for aging. They limit the length of our (5) . The company behind the project, Life Length, says the test will give people an idea of the speed at which they are ageing. Critics have been quick to attack the test. They say it is unethical, (7) , and could lead to insurance firms demanding people take the test before (8) policies.
