Peruvian archaeologists discovered an Incan tomb in the north of the country where an elite member of the pre-Columbian empire was buried, one of the investigators announced Friday. The discovery was made on the Mata Indio dig site in the northern Lambayeque region, archaeologist Luis Chero told state news agency Andina. Archaeologists believe the tomb…

Read more Archaeologists discover Incan tomb in Peru

Magnetic north has never sat still. In the last hundred years or so, the direction in which our compasses steadfastly point has lumbered ever northward, driven by Earth’s churning liquid outer core some 1,800 miles beneath the surface. Yet in recent years, scientists noticed something unusual: Magnetic north’s routine plod has shifted into high gear,…

Read more Magnetic north just changed. Here’s what that means

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

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