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Great Barrier Reef
The Great Barrier Reef is the world's largest coral reef. The reef is located off the coast of Queensland in north-east Australia. It stretches over 2000 kilometres in length and can be seen from ... > more -
Circulatory system
A circulatory system (sometimes cardiovascular system) is an organ system that moves substances to and from cells; it can also help stabilize body temperature and pH (part of homeostasis). There are ... > more -
Giant Otter
The giant otter is the largest of the world's otters. It is native to South America but is endangered and is also very rare in captivity. The Giant Otter can reach up to 6 ft (1.8 m) in length, and ... > more
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