February 18, 2005

Getting Physical Inside a Pyramid

By MARION LLOYD

Scientists hope subatomic particles will help unlock the mysteries of an ancient Mexican monument

Equipped with hard hats and rubber flashlights, a team of Mexican physicists begins its slow descent into the bowels of the world's third largest pyramid. The scientists wind their way through the cramped, water-soaked passageways of an ancient tunnel beneath the Pyramid of the Sun at Teotihuacán, retracing the steps of the mysterious people who settled here more than 2,000 years

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