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PaleontologyDinosaur tracks show walking and running
A single trail of dinosaur footprints found in a British limestone quarry preserves a record of two different walking styles in the same animal, a tantalizing clue that some types of lumbering, bipedal dinosaurs could also run if the need arose.
By Sid Perkins -
Planetary ScienceGalileo at Jupiter: The goodbye tour
After more than 6 years spent touring Jupiter and its four largest moons, the Galileo spacecraft’s mission is beginning to wind down.
By Ron Cowen -
Infants emerge as picky imitators
By the age of 14 months, babies display a feel for evaluating the sensibility of an adult's behavior and either imitating the means to a goal or opting for a simpler way to achieve the same result.