• She swims with sharks before breakfast

    Kim Chambers is one of the world's best marathon swimmers and is the sixth person to complete the "Oceans Seven," the ultimate open water swimming challenge.
  • Will lab-grown organs cure cancer?

    Scientists have figured out how to grow organs from skin cells. CNN's Rachel Crane explores a lab that is using this technique to revolutionize cancer treatments.
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    Growing human bones from fat

    Bone transplants are one of the most common procedures, but we only have so much bone in our bodies to harvest. A lab in New York has a solution: Grow bones from fat cells.