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That's where you'll find animal species not native to other part of the world.Like koala,platypus and most known kangaroo.
Scientists say that about 600 million years ago,what we know now,Antarctica,South America,Africa,India and Australia formed one huge continent called Gondwanaland.It was populated with dinosaurs and the first mammal-monotremes and marsupials.
Monotremes,like platypus lay eggs from which their offspring hatch.While Marsupials,like kangaroo produce offspring that develop in a pouch outside their mother's bodies.
Kangaroos are the largest marsupials.Males are called boomers,females does and babies called joeys.
What does the average kangaroo look like?
Most adults are about 6 feet (1.8m) tall and weigh about 100 pounds (45 kg).They have large hind feet,strong hind legs and a tail measuring (3 feet 9m) or longer.A kangaroo uses its heavy tail for balance and to prop itself up when sitting or fighting,when it kicks the enemy with both hind feet.
Normally kangaroos are quadrupeds,they use all four feet to walk.Even their short limbs,like arms help them move.But animals stand on two feet when they want to move quickly.They can hop up to (40 miles-64 km) per hour over short distances and leap over (30 feet-9.2 m) in a single bound.
About 130 million years ago,Gondwanaland broke apart and Australia was cut from the rest of the world.Marsupials and Monotremes still flourished there.
But elsewhere, newer species of mammals appeared that gave birth to fully developed young.That's why you won't find kangaroos across the Antarctica.