A tiny copper-alloy object long dismissed as a simple awl has been reclassified as the earliest known rotary metal drill from ancient Egypt. Original photograph of the Badari drill published in 1927 by Guy Brunton (left) and the actual artifact. Image credit: Martin Odler & Jiří Kmošek, doi: 10.1553/AEundL35s289. The ancient drill is only 6.3 cm (2.5 inches) long and weighs about 1.5 grams. Dating from the Predynastic period (4th millennium...
