In 2010, roughly 500 Maasai landowners in Kenya pooled 50,000 acres into the Naboisho Conservancy, kept their cattle on the land, and watched lion, elephant and giraffe numbers climb — while collecting monthly lease payments tied to the wildlife's return.
In September 1854, London physician John Snow ended a cholera outbreak that killed 616 people in ten days by mapping every death on a Soho street grid, tracing the cluster to a single contaminated water pump on Broad Street, and having its handle removed — founding modern epidemiology in the process.
In 1868, a young Swiss physician named Friedrich Miescher scraped pus from surgical bandages inside a converted castle kitchen in Tübingen and isolated a strange phosphorus-rich substance he called 'nuclein' — the first purified DNA, 84 years before Watson and Crick.
Astronauts returning from six-month ISS missions can be up to 5 centimetres taller than when they launched, the result of spinal discs swelling in microgravity. The bonus height disappears within days of splashdown, often accompanied by back pain and a sharply raised risk of herniated discs.
The Loess Plateau in north-central China, larger than metropolitan France, once sent 1.6 billion tonnes of silt into the Yellow River each year. A 1999 policy called Grain to Green — combined with tens of thousands of check dams and a nationwide grazing ban — cut that flow by close to 90 percent within two decades.
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