Giant waves that destroy everything in their path. How do they come about? What explains their power and where do they cause the most damage and victims?
To find out, we take a look at Indonesia, where one of the most powerful known tsunamis hit just off of Sumatra in 2004. In 2011 another tsunami destroyed the coast of Japan, reaching several kilometres inland and threatening two nuclear power plants. Today, scientists know a lot about these two forces of nature, however, some questions remain unanswered.
