HealthPrebiotic chewing gum could be helpful for gum disease A small trial found that chewing gum containing nitrate can ease the symptoms of gum disease by favouring the growth of beneficial mouth bacteria ¿ìè¶ÌÊÓÆµ
HealthMartin Rees: Why challenge prizes can solve our most pressing issues As the winner of the Longitude prize on antimicrobial resistance is announced, chair of the prize committee Martin Rees, the UK's Astronomer Royal, explains why it pays to reward ideas Comment