After decades of hype and setbacks, scientists have made impressive progress into tricking stem cells into repairing organs.

Coughing violently, he spit out what looked like moist and crusty bits of dark gray paper with black streaks — dead lung tissue, his respiratory therapist told us. Smith suffers from progressive ...

The burst of the dead cells leads to ruptures in ... For example, they must first be mobile to spread over the tissue surface, then quickly adhere to lung cells upon contact, and later activate ...

Coughing violently, he spit out what looked like moist and crusty bits of dark gray paper with black streaks — dead lung tissue, his respiratory therapist told us. Smith suffers from progressive ...