Astronomer Royal Martin Rees has publicly offered a bet that a biological catastrophe-accidental or intentional-will kill at least one million people by 2020 (so far, no takers).
天文学家RoyalMartin Rees给出一个公开的赌注:他预言将会有一场生物学灾难-偶然事故或人为故意-到2020将会令至少一百万人丧生(迄今为止,无人接招)。