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).
1 Red Kangaroos are not only the largest kind of kangaroos in the world, but the largest marsupial on the planet, too. 2  Red Kangaroos can be as tall as seven feet and can weigh up to 200 pounds. 3  They live in the dry areas of Australia. Eastern Grey Kangaroos may not be as well known as the Red Kangaroos, but since they tend to live in the fertile parts of Australia where more people live, they are seen the most. 2  Western Grey Kangaroos are found in the southern and southwestern areas of Australia.