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.
Polo is played on an outdoor grass field 300 yards (274.3 m) long by 160 yards wide. Centred at each end are lightweight goalposts 8 yards apart. A score is made by hitting the ball between the goalposts. Play begins with the two teams of four lined up facing each other in the centre of the field.