Life expectancy is increasing globally thanks to improved healthcare and hygiene, medical technology advances, and poverty reduction. In fact, the human race is steadily edging towards the ultimate lifespan of 150 years, according to recent research.

There's still a very long way to go to reach that milestone, and even by 2050, massive life expectancy disparities between countries are predicted to persist. While the global average is expected to rise from 73.4 to 77.2 years by 2050, some countries, particularly in Africa, are projected to fall way short of that figure.

Read on to discover the predicted life expectancy in 2050 for 30 selected countries based on data collated by database.earth, ranked from the lowest to the highest. All dollar amounts in US dollars.