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close-up of an eye

BABY BLUE  Using human eye cells, researchers fashioned an artificial eye surface that could be used to study and test treatments for eye diseases.

Hibbard mummy

MUMMY MYSTERY  The Hibbard mummy, now on display at Northwestern University, holds the body of a girl estimated to be 5 years old at death. Recent analyses might help reveal a cause of death.

Picasso's Tête de femme de profil (Marie­-Thérèse)

HISTORY MYSTERY  Picasso first created this sculpture, Tête de femme de profil (Marie­-Thérèse), in plaster in 1931, but its origins in bronze were unknown. A new analysis of the metals in the bronze gave an important clue to where and when it was cast.

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