Almost half of Spain's flood victims were aged 70 or over, data shows - Ageing is not gradual, with people undergoing 'dramatic changes' in their 40s and 60s, study finds - Scientists find humans age dramatically in two bursts - at 44, then 60 - Study finds bursts of rapid aging at 44, 60 - Global population to peak within this century as birth rates fall, United Nations report says - Why southern Europeans will soon be the longest-lived people in the world - Here's where BlackRock sees investment opportunities as demographics shift and the population ages - Coastal populations set to age sharply in the face of climate migration, researchers find