- Breaking News
- |
- Entertainment
- |
- Sports
- |
- Business
- |
- Politics
- |
- Science
- |
- Technology
- |
- Odd News
- |
- Health
- |
- Law
Animals
WASHINGTON - Scientists have grown a piece of heart muscle - and then watched it beat - by using stem cells from a mouse embryo, a big step toward one day repairing damage from heart attacks.
