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Scientists at Work(8 min 16 sec) Biologist Ken Dial's study of how young birds use their developing wings sheds light on the evolution of flight in birds.
ActivityA lesson in which students analyze graphs and data on pollen grains and fern spores to form a picture of the living landscape before and after the K-T mass extinction.
ActivityA hands-on activity in which students see first-hand the difference in foraminifera fossils below and above the K-T boundary. Also available in Spanish.
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