News and Topical issue. If we travelled back in time to the Bratislava of the Middle Ages, would we even recognise the Danube as the same river we know today? Bratislava historian Brano Chovan explains just how the river has changed since then. Would we know it if an asteroid was about to destroy the Earth? Bratislava scientist and asteroid detection expert Juraj Toth explains how new developments are slowly improving our ability to detect meteors before they hit the Earth.