Thursday, February 24, 2005 A paste containing synthetic tooth enamel can seal small cavities without drilling. Kazue Yamagishi and colleagues at the FAP Dental Institute in Tokyo say that the paste can repair small cavities in 15 minutes. Currently, fillers don’t stick to such small cavities so dentists must drill bigger holes. Hydroxyapatite crystals, of which natural enamel is made, bond with teeth to repair tiny areas of damage. Yamagishi

Thursday, January 26, 2012 Germany’s Chancellor Angela Merkel gave yesterday’s opening address to the 42nd meeting of the World Economic Forum (WEF), which is facing a distinctly different geo-political landscape from twelve months ago. Outside the WEF security cordon, in the sub-zero temperatures of Davos’ train station car park, the local incarnation of the Occupy movement are setting up ‘Camp Igloo’; but, with little hope of the archetypes of the