Four extremely rare white tiger cubs born in captivity are presented by Borysew Zoo in central Poland. The arrival of four baby white tigers has brought a cute new attraction to the zoo at Borysew, a town near the Polish city of Lodz, but the birth of the inbred species has also raised ethical questions. The quadruplets - two females and two males - were born on March 21 after four years of searching for a suitable mother, Borysew zoo owner Andrzej Rabich said.