Many parents may try to step away from their children when they smoke, but children exposed to even small amounts of smoke may grow up to have heart problems.

Stroke usually affects people later in life. However, new research suggests that it's not just older adults who should be careful.

Current human exposure to the metal tungsten is thought to be low. But increasingly, the metal, which is used in cell phones and computers, is entering the environment and being linked to higher health risks.

Practice makes perfect, they say, but keep on practicing even after perfection. Continued practice makes the body more efficient - so that the same tasks use less energy.