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"Betty got it right away. You've got to do the work. And I really think that's Betty. She's willing to make the sacrifices necessary to reach her goals." --Eric Grotzinger

NASCAR is hiring mechanical engineers and aerodynamics scientists to shave milliseconds off lap times and push racecars to their limits.

Science Careers talks to three young investigators who contributed to this year's monumental discovery.

The best and most popular stories of 2012, as chosen by readers and editors.