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.
Marco Polo. Marco Polo was an Italian merchant and explorer, famous for introducing Europeans to China and Central Asia. He inspired future travelers, including Christopher Columbus. Born presumably in the Republic of Venice around 1254, Marco Polo played an important role in cartography.