Ageing population: ticking timebomb or medical miracle? The world's population of people aged 60+ is expected to reach 2 billion by the year 2050, up from 900 million in 2015. But what does this really mean in terms of people's health, and how can researchers and healthcare professionals respond to this shift?  Dr. Nir Barzilai, the founding director of the Institute for Aging Research at Albert Einstein College of Medicine, discusses his own research into increasing our lifespans and promoting healthier ageing.