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Formerly joined twins survive and thrive

Meet the sudoku master

Three young Americans stop at nothing to halt one of Asia's biggest killers

Peering into the crystal ball

Ninety-three and still pumping

As you get older you get happier. No, really

Can the system keep up with demand for new hips and knees?

What your mom ate as a child could give you a stroke in middle age

One man's quest to lengthen life by cutting calories

Stem cell research offers clues -- but don't hold your breath