Vietnamnet.vn
Podcast
GLOBE
Update news GLOBE
Billions 'have untreated tooth decay'
More than 2.4bn people have untreated tooth decay across the globe, a study in the Journal of Dental Research suggests.
Kepler telescope spies 'most Earth-like' worlds to date
The search for a far-off twin of Earth has turned up two of the most intriguing candidates yet.
