A ship moves down the ice choked Danube River in Budapest, Hungary, on Feb. 9, 2012.
Ice floes on the Danube in Budapest, as seen on Feb. 11, 2012.
Two ships on the banks of the Danube River in Novi Sad, Serbia, on Feb. 11.
The frozen Danube River on Feb. 11, 2012.
A wide shot of the frozen river on Feb. 12, 2012.
Ice covers the Danube River in Vienna, Austria, on Feb. 12, 2012, after days and days of freezing temperatures.
Live Science Staff,
For the science geek in everyone, Live Science offers a fascinating window into the natural and technological world, delivering comprehensive and compelling news and analysis on everything from dinosaur discoveries, archaeological finds and amazing animals to health, innovation and wearable technology. We aim to empower and inspire our readers with the tools needed to understand the world and appreciate its everyday awe.