Mt. Erebus Antarctic expedition 2007 - Image 42âŒ©=de of 58
Click on image to show next one - © Alexander Gerst 2007
...but often the result is worth the effort. If an entry into the ice cave system below can be found, several kilometres of cave are waiting to be explored by the scientists. Often the caves are filled with a magical blue light, caused by the sun shining through the thick roof of ice.