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).
There are more kangaroos than people in Australia. The four species of kangaroo that are commercially harvested have very large populations. None is threatened or endangered. The Red kangaroo, Eastern grey kangaroo and Western grey kangaroo are the most abundant species and make up over 90 per cent of the commercial harvest. Their combined population size has fluctuated between 15 and 50 million animals over the past 25 years in the harvested areas, depending on seasonal conditions..