Human impacts prior to the Industrial Revolution are not well constrained. We investigate whether the decline in global atmospheric CO2 concentration by 7–10 ppm in the late 1500s and early 1600s which globally lowered surface air temperatures by 0.15∘C, were generated by natural forcing or were a result of the large-scale depopulation of the Americas after…

Read more Earth system impacts of the European arrival and Great Dying in the Americas after 1492

Matt Baker of Useful Charts has designed a wonderful high resolution wall chart (larger) that explains the how each letter of the alphabet developed over various periods within thousands of years. The chart shows how modern English language evolved from the ancient Proto-Sinaitic script of biblical times to the Phoenician alphabet to the Archaic Greek…

Read more The Evolution of the Alphabet

Something strange is going on at the top of the world. Earth’s north magnetic pole has been skittering away from Canada and towards Siberia, driven by liquid iron sloshing within the planet’s core. The magnetic pole is moving so quickly that it has forced the world’s geomagnetism experts into a rare move. On 15 January,…

Read more Earth’s magnetic field is acting up and geologists don’t know why?!

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