Erik Klemetti

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Rocky Planet

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Guiengola's North Plaza, the only area not covered by tree canopy, as pictured from above. (Credit: Pedro Guillermo Ramón Celis/McGill University)

Guiengola-site

Learn about the abandoned Zapotec city of Guiengola in Oaxaca, Mexico, featuring a society based on communal work that would flourish until the 16th century Spanish conquest.

Abandoned, but Once Flourishing Pre-Columbian City Was Unearthed in Mexico

This image is a battle reenactment from the Medieval times and not the Roman Period, but represents a warrior battle. (Credit: Gorodenkoff/Shutterstock)

Medieval Knights Fighting with Swords

Learn why the use of a tiny spoon likely suggests that Germanic communities used psychotropic drugs for battle. 

Warriors of the Roman Period May Have Used Narcotics Before Battle

A mosaic image of asteroid Bennu, composed of 12 PolyCam images collected by the OSIRIS-REx spacecraft from a range of 24 kilometers. (Credit: NASA/Goddard/University of Arizona)

Asteroid Bennu and building blocks of life

Analyzing a sample from an asteroid named Bennu reveals the chemicals necessary to form DNA and RNA.

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