When did insects first appear on earth? Insects are the most successful of all animal group, making up of the whole animal kingdom. There are about 10.000 in-sects living …
When did the America’s worst space disaster happen? America’s worst spare disaster was during the launch of Challenger in 1986 when hot gases leaked through a joint in the …
When did birds evolved from reptiles? All living things change over thousands of year to chances of survival. This process of change is called evolution. Birds evolved from reptiles …
When people began using Hieroglyphics? The ancient Egyptians spoke a language related to the languages of the middle east and north Africa. Those who could, wrote using a system …
When was electricity discovered ? Electricity was first discovered by the ancient Greeks, about 2000 years ago. A Greek scientist called Thales noticed that a piece of amber (the …
Why do plants flower at different times of the year? Flowers appear at the times that are most suited to the production of seed for the continuation of the …
Why is the “Hindu rate of Growth” called so? This term was coined by Dr. Raj Krishna in 70s to describe the inability of the Indian economy to grow …
Why is meteorology an international science? Meteorology is the study of weather. It is done to know about the weather conditions and make accurate forecasts. Many countries cooperate with …
