"Lord Martin Rees is a cosmologist and astrophysicist at Cambridge University and co-founder of the Centre for the Study of Existential Risk<br>He is great man . But not easy to convince . I met him 21 years ago  and he taught me Applied Statistics to apply on Analysis of random Subjects prone to Drinking", Carefree, Smoking and Mating  , for Medical Policy making &amp; control of such Propensity .