Recently the internet company Baidu promoted its driverless car (also called UGV -Unmanned Ground Vehicle) in a conference in Wuzhen, Zhejiang and quickly gained lots of spotlight. The driverless car has passed some driving test successfully in public road and will be put in commercial production in the near future. Just decades ago, unmanned driving is just a dream, and now it’s almost coming true. Similarly, human never thought they can fly until planes were created. With the efforts of scientists and their inventions, human life have never been so convenient and easy. So let’s talk about the most impressive or important inventions in your mind. Since there’re so many of them, let’s define our topic to modern inventions, mostly in 20th and 21st century.