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Scientists explain a theory that a giant asteroid collided with the earth millions of years ago, tossing a killing cloud of dust and debris into the atmosphere.
Time-Life Video and Television, 1450 Palmyra Ave., Richmond, VA 23227-4420, Phone: (804)266-6330, Toll-free: 800-950-7887, Fax: (757)427-7905
Available on VHS
Running time 57 minutes.
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