4

Lakes could easily have been created that were held in place only by glaciers or rubble dams, which naturally, as glaciers melted or levels again rose, would give way as water pressure overpowered them.

2

The causes of formation and breaking waves.

3

Japanese Prime Minister Naoto Kan confirms that Japan is in "State of Nuclear Emergency".

0

A simple overview of the energetics of chemical reactions.

1

A sea monster fossil was found in Peru.

0

The flying fishes perform jumps up to six metres above water and gliding flights of 150 metres. Do they really fly?