In most Japanese cities, an address doesn't point to a street but to a series of nested areas: district, sub-district (chōme), block, then building number. Apart from major avenues, streets are often nameless. And numbers don't always run in order along the pavement: in some areas, they were assigned according to when plots were registered. Hence the neighbourhood maps posted near street corners.
That's the estimate from a WHO-led study published in The Lancet in 2024, covering the half-century since the Expanded Programme on Immunization was launched in 1974. It works out to about six lives saved every minute, mostly infants. The measles vaccine alone accounts for around 60% of those lives.
According to the World Gold Council, about 216,000 tonnes of gold have been mined in all of human history. Because gold is so dense (19.3 tonnes per cubic metre), it would fit in a cube about 22 metres on each side, roughly the height of a seven-storey building. Strikingly, about two-thirds of it has been mined since 1950.