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High Rollers
This story follows the first trials of a new kind of rollercoaster design, allowing cars and riders to roll upside down, like in a jet fighter.


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New Hearts for Newborns
Pioneering work is leading to successful heart transplants for infants, and progress on preventing post-surgery rejection of the transplant.


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Woodpecker Housing Crunch
After Hurricane Hugo destroyed most of the rare red-cockaded woodpecker's nesting trees, the birds were lured into hundreds of artificial nest sites.


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Facing Feelings
Psychological experiments attempt to tease out the relationship between how you feel, and how you look as if you feel.


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Supercool Squirrels
Alaskan ground squirrels studied during winter hibernation seem to cool themselves below the point at which their blood should freeze.


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