According to the World Food Programme, around 466 million children received school meals as of 2024, making it one of the world's most widespread safety nets. It works in two ways: a free meal encourages families to send children, especially girls, to school, and well-fed children learn better. Coverage is still low in the poorest countries, though.
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.