1.Our 'Heart' can pump the blood upto 70 feets in open environment. 2.'Virus' is the connecting link between living & non-living. 3.Most of us use only4-5% of our brain. 4.Earthworm has 14 hearts. 5.Enamel(uppermost layer of our teeth) is the hardest substance in our body. 6.Snakes are not found in New zealand. 7.Human 'brain' is the most complex organ on the earth. 8.In Tokyo, traffic policeman needs an oxygen treatment after 4 hours of his duty because of heavy pollution. 9.Tongue of Whale is not moveable. 10.Blue whale has the largest heart. 11.Tongue of Chamaleon is twice of its body length. 12.Most domestic mammals(Dogs,cats,cows etc.) & Sharkes can not see colours. 13.Most birds have only day vision. 14.One species of Antarctic fish is the fish known to have white blood. 15.'Amazon' forests are known as 'Lungs of Earth'.