Stem cells blamed for cancer re-growth

Researchers presented evidence Wednesday for the existence of cancer stem cells, with three different studies seeking to end a decades-old scientific dispute about how tumors grow.

Researchers presented evidence Wednesday for the existence of cancer stem cells, with three different studies seeking to end a decades-old scientific dispute about how tumors grow.

Some stem cells can lay dormant for more than two weeks in a dead person and then be revived to divide into new, functioning cells, scientists in France said Tuesday.

The symbolic 7 billionth baby in the world has been born, and so baby Danica begins her journey in an uncertain world. But like all babies born in the past, and in the future, one question persists: How would the infant be given the best chance to a healthy life?