Equilateral Triangle: A triangle with all the sides of same length is called equilateral triangle. Isosceles Triangle: A three-sided polygon with at least two sides of the same length is called isosceles triangle. Scalene Triangle: A three-sided polygon with no sides of the same length is called scalene triangle.
Scientists Declare The Great Barrier Reef Dead At 25 Million Years. The Great Barrier Reef is considered Australiaâs national treasure as it once was filled with marine life, amazing coral reefs, and crystal clear waters. The incredible Coral Sea Wilderness has been declared dead by scientists at 25 million years old â ending its years of struggle and illness. However, locals claim that the reports of its demise have been exaggerated and there is plenty of life left in the worldâs largest barrier reef.
Great Barrier Reef. The Great Barrier Reef is an ocean ecosystem that can be seen from space. Estimated to have existed for 250 million years, the Great Barrier Reef and its multitude of marine life are immersed in a challenge that has the entire system on the brink of extinction.ut the world's reefs, like the world's rainforests, are declining. The Great Barrier Reef is not the only coral ecosystem endangered. All of the world's coral reefs are struggling to survive. The Christian Science Monitor reported in early 2009 that growth of the coral in the Great Barrier Reef is slowing.