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SYDNEY, Feb 14 (Reuters) - Tiebreaker: Please give the names of the two scientists who proposed a widely accepted theory in 1980 that an asteroid hit the Earth about 65 million years ago where as a result, most dinosaurs went extinct.
Answer: Luis Alvarez and his son Walter Alvarez
Overall Winner: Kate Schachtel, Westpac Banking Corporation
(Reporting by Thuy Ong; Editing by)
((thuy.ong@thomsonreuters.com; +61 2 9373 1236; Reuters Messaging: thuy.ong.thomsonreuters.com@reuters.net))