This chapter examines the effects of rising global temperatures on elite athletes and the heightened risks they face in competition. It also highlights a Colombian doctor's groundbreaking research on Alzheimer's disease.
After Israeli fires rockets into Lebanon and Hizbullah warns of “red lines” crossed, the Middle East is braced for further attacks. As the planet warms, sport is getting harder – and deadlier (6:32). And celebrating Francisco Lopera, who dedicated his life to researching Alzheimer’s disease (13:36).