That xkcd is such a joker. Munroe should start a comic.
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From the teenage years to college to adulthood through retirement, sleep is all over the place at first but then converges towards consistency.
Carpe diem. Seize the data, boys. Make your lives extraordinary.
With wildfires burning in the western United States, smoke fills the air. This is an animation of the air quality during the past couple of months.
The way that people get around can say a lot about how a place is made up. Here’s an interactive map that shows how people get to work in America.