If pills are taken every day at the same time, and each pack is started on time, oral contraceptives are 99% effective in preventing pregnancy. On average, oral contraceptives are 93-97% effective because women often miss pills or do not start a new pack on time.
Kangaroos are large marsupials that are found only in Australia. They are identified by their muscular tails, strong back legs, large feet, short fur and long, pointed ears.angaroos are the only large animals that hop as a primary means of locomotion. Their springy hind legs and feet are much stronger and larger than their arms (or forelimbs). According to the San Diego Zoo, kangaroos can cover 15 feet (7 m) in a single hop and can hop as fast as 30 mph (48 kph).
Grey Kangaroos. The Grey kangaroo is the next largest. Two species, the Western and Eastern grey, belong to this family. The Western kangaroo lives as you might expect in Western Australia, but the Eastern kangaroo likes forest and grassland areas of Australia's east coast, and is the only kangaroo species on the island of Tasmania. The species has a woolly textured coat, compared to the Red kangaroo's silkier one, and is a grayish-brown color.