Meredith Reba, Femke Reitsma and Karen C. Seto compiled a dataset of urban settlements between 3700 BC and AD 2000. It’s the first of its kind, and while not comprehensive, it does provide a view into growth around the world. Max Galka put together the straightforward map above to display the data.
Growth of cities, going back 6,000 years
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Sleep Schedule, From the Inconsistent Teenage Years to Retirement
From the teenage years to college to adulthood through retirement, sleep is all over the place at first but then converges towards consistency.
How Different Income Groups Spend Money
After living expenses, where does the money go, and how does it change when you have more cash available?