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Archaeology

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tiny mouse skull

The tiny molars in this skull help tell a tale of mice and men, and how humans transitioned from nomadic to sedentary lifestyles.

Clovis points

CLOVIS LINEUP  Researchers studied how stone replicas of spear points (two at right) used by ancient Clovis people absorbed pressure. Results suggest Clovis points fluted at the base absorbed shock, preventing tip breakage while hunting. Three casts of actual fluted Clovis points are on the left.

ancient tooth decay

DENTAL WORK  Seen from above in computer reconstructions, cavities in two human teeth dating to around 13,000 years ago contain signs of an ancient treatment for tooth decay. Marks on the inner walls of each cavity were made by a pointed stone tool used to remove infected tissue, researchers propose.

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