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During Hurricane Katrina, evacuating New Orleans residents were forced to leave their pets behind. Bobbi the dog was initially chained to keep her safe, but after her owners failed to return, she had to break free. For months, Bobbi wandered the city's ravaged streets-dragging her chain behind her-followed by her feline companion, Bob Cat. After months of hunger and struggle, the Two Bobbies were finally rescued by a construction worker helping to rebuild the city. When he brought them to a shelter, volunteers made an amazing discovery about the devoted friends-Bob Cat was actually blind ...

Less than two decades ago, archaeologists considered lithic debitage, the flakes and debris left from the manufacture of stone tools, little more than uninformative waste. Since then, fieldworkers have increasingly recognized that stone flakes can provide information both singly and in aggregate.

Many methods are now available for analyzing lithic debitage, yet no single method is entirely reliable as a vehicle to meaningful interpretation of past behavior. Part of the problem lies in the disparity between tightly controlled experimental conditions and the difficulty of sorting...