A hippo cub touches its mother Nicole during the first public presentation at the Zoo in Berlin, Tuesday, Nov. 1, 2011. The cub which is yet unnamed was born on Oct. 23, 2011 at the zoo. (Markus Schreiber / Associated Press)
A hippo cub lies next to its mother Nicole during the first public presentation at the Zoo in Berlin, Tuesday, Nov. 1, 2011. The cub which is yet unnamed was born on Oct. 23, 2011 at the zoo. (Markus Schreiber / Associated Press)
A hippo cub walks next to its mother Nicole during the first public presentation at the Zoo in Berlin, Tuesday, Nov. 1, 2011. The cub which is yet unnamed was born on Oct. 23, 2011 at the zoo. (Markus Schreiber / Associated Press)
A hippo cub lies next to its mother Nicole during the first public presentation at the Zoo in Berlin, Tuesday, Nov. 1, 2011. The cub which is yet unnamed was born on Oct. 23, 2011 at the zoo. (Markus Schreiber / Associated Press)
A hippo cub swims next to its mother Nicole during the first public presentation at the Zoo in Berlin, Tuesday, Nov. 1, 2011. The cub which is yet unnamed was born on Oct. 23, 2011 at the zoo. (Markus Schreiber / Associated Press)
A hippo cub and its mother Nicole make their first public presentation at the Zoo in Berlin, Tuesday, Nov. 1, 2011. The cub which is yet unnamed was born on Oct. 23, 2011 at the zoo.