There are many great inventions of man for example from a ancient time ---from a wooden wheel to a cart and in today's world from electronic ---a little sim to computers LED tvs and refrigerator medicinal ---from a medicine to big x-ray and many others machine...these all things are the great inventions of humans ....without them life would be difficult or impossible and all these things are because of Science ....behind them there is a big hand of Science ..if science would not be there then these all things or inventions would be just impossible .....Science is like a Blessing  .....if there wouldn't be wooden wheels then the transport would be just very difficult or like impossible main motto is to tell you that in Science from a little to little invention is also the GREATEST......
please mark it as the best if it helped :D