In classic xkcd-fashion, Randall Munroe timelines the Earth’s temperature, dating back to 20,000 BCE up to present. Slow changes, slow changes, history, slow changes, still slow changes, and then, oh shoot.
xkcd: Earth temperature timeline
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Data Underload #17: Famous Movie Quotes, p. 2
Carpe diem. Seize the data, boys. Make your lives extraordinary.