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.
Australia's Great Barrier Reef. Branching Coral and Soldier Fish on the Great Barrier Reef ( Pniesen | Dreamstime.com) Just before 11 pm on June 11th, 1770, the HMS Endeavour, captained by Lieutenant James Cook, ran aground. Cook had been exploring the northeast coast of Australia when the accident occurred.