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Who invented gun powder?

Gunpowder is a mixture of potassium nitrate, sulfur, charcoal and saltpeter and has excellent burning properties. Gunpowder is also known for the huge amount of gas and heat it generates when burned. Chinese were the first to invent and use gun powder. Initially it was […]

What is global warming?

Global warming is one of the burning issues nowadays. It is the natural warming of the atmosphere (as well as natural cooling). These days global warming refers to the gradually increasing temperature of the earth due to the greenhouse gases like carbon dioxide, methane and […]

What causes diabetes?

Many people all over the world are suffering with diabetes. It is a metabolism disorder. The food we eat, after digestion is broken down into glucose and is used by our body cells for growth and energy. Insulin (a hormone produced by the pancreas) helps […]