Bài giảng

The next time you think about going without sleep, consider this: Laboratory animals that are kept awake for long periods of time … die. Yet […]

If using your voice is difficult, then you know what dysphonia is. The more common name for this disorder is hoarseness.Experts say about one in […]

Human genes are normally organized along forty-six chromosomes in our cells, twenty-three from each parent. But some people are born with an extra copy of […]

A.D.H.D. is attention deficit hyperactivity disorder. Children with A.D.H.D. might have trouble paying attention. They might not seem to listen. They might forget things. They […]

Vitamin D helps bones and muscles grow strong and healthy. Low levels of vitamin D can lead to problems like rickets and osteoporosis. Rickets is […]

This is the VOA Special English Health Report.Three scientists based in the United States have won the two thousand nine Nobel Prize for Physiology or […]

Pope Benedict named five new saints in October, including a Catholic clergyman who cared for people in a leper colony. Father Damien was born Joseph […]

Two recent studies have found that punishment is not the best way to influence behavior.One showed that adults are much more cooperative if they work […]

A concussion happens when the brain is shaken, often in a car crash or a fall or a strike to the head in sports. Concussions […]

In nineteen eighty-seven, H.I.V./AIDS joined a list of diseases that could keep a person out of the United States. The government later tried to cancel […]