INVENTIONS OF 20TH AND 21ST CENTURIES:
The inventions which we see in our daily lives such as telephones,washing machines, televisions, smart phones, tabs are come from the science.Scientists have invented these all inventions. In my opinion best invention is Apple iPad, because iPad is just like a mini-computer.We can carry it anywhere.We can search about some new inventions through it.We can play online games and even we can study online.The first version of iPad was released on 23rd October 2001.It is a line of portable media players.iPad was designed by Apple Inc. As of the worst invention,I think weapons are the worst invention, because they are used to take other living thing's lives.Weapons including swords, guns, and knife are very common which criminals use to kill people.In America, there are approximately 270 million firearms possessed by civilians and around 897,000 carried by police.Close to 33,000 Americans were victims of gun related deaths in 2011 and an averag...