Tag: How to Questions
When did the use of antiseptics start first? At Until the 1860s, patients who had operations often suffered it and died. It was because their wounds got infected with …
When were the first “flying saucers” reported? The first “flying saucers” were reported in 1947 and since then about 40 million UFO sightings have been recorded. The most common …
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 …
