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Video: Engineers Help Detect Football Injuries

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Video: Where’s the Turkey?

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Video: Xbox Surgery

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Lie Detection for Your Brain

PolygrafTwo companies believe that they have created the ultimate truth-revealing technology to help accurately determine who should go to jail and who should be freed.

Instead of relying on polygraph tests (see above image), which use pulse and breathing measurements to catch liars, the companies are using brain-scanning fMRI (functional magnetic-resonance imaging) scanners, which work by detecting the change of oxygen levels in response to neural activity. If a section of the brain is working hard, it will use more oxygen and glow brighter on the scan.

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Video: PBS Presents Engineering Your Future – Biomechanical

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