andrew roberts, the historian will be joining us live in studio. that s going to be fun. you re actually going to go to the bank between now and 9:15 a.m. yeah. it s going to be a lot of trips. they only let me take out $200 at a time. i don t want to get fined. i ll look forward to the dough. you may soon be able to go to the drugstore and buy a simple blood test to find out how long you ll approximately live. the life link test is based on the nobel prize winning study of the material in human chromosomes called telemeres. dr. jerry shade joins us, a professor with the university of texas southwestern medical center and the scientific advisor for life link. good morning to you, doctor. good morning. how are you all doing? we re doing ok. so this has been depicted as a blood test that will predict how long you will live. is that accurate or does this really tell you how your body is biologically aging? it tells you how your body is biologically aging so