Bird droppings are the chief export of Nauru

The Republic of Nauru is a small island country in Micronesia in the central Pacific. Covering an area of just 21 square kilometres, it is the world’s smallest republic. Nauru is a phosphate rock island having rich deposits near the surface. Its economy is essentially dependent on the phosphate deposits originating from droppings of sea birds.

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Ancient Indians’ contributions to mathematics

Indians have made significant contributions to calculus, trigonometry and algebra. The decimal system was invented in India in 100 B.C. The concept of zero as a number is also attributed to India. The ancient Indian mathematicians are also credited with developing the concept of negative numbers.

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