Baleen is often called whalebone, but that name also can refer to the normal bones of whales, which have often been used as a material, especially as a cheaper substitute for ivory in carving.he whale then pushes the water out, and animals such as krill are filtered by the baleen and remain as food source for the whale. Baleen is similar to bristles and is made of keratin, the same substance found in human fingernails and hair.
Marco Polo (game) The game Marco Polo /ËmÉËrkoÊ ËpoÊloÊ/ is a form of tag played in a swimming pool. The origin of the game is unknown.
The Marco Polo swimming game originated in the 1960s, but its history is unknown. The game itself is named after an Italian explorer in the 13th and 14th centuries who traveled to China with his father and uncle. When he returned to Italy and told of his travels, he inspired others to venture East pursuing wealth.