You might recognize that a tsunami is approaching because the ocean tide begins to recede to an extremely low level.
The largest continent is Asia. It covers 29% of earth's land area. in 2016 alone Asia had 4.436 billion people in it. Asia is 17.21 million mi^2.
The Danube, which is the second-longest river in Europe. The Loire, which flows through France and splits the country midway. The Elbe, which flows through Germany and the Czech Republic and links popular destinations. The Rhine, which streams 766 miles to the Netherlands and ends in the North Sea. The Volga, which is the longest river in Europe.
