Nowadays,Innovations of science and technology make us to pass many limits we ever had in the past. One example of these innovations is 'silk leaf' created by Julian Melchiorri, a graduate student from RCA, with the project title as "Innovation Design Engineering course". He can develop Silk leaf is an artificial leaf that can photosynthesize and give us oxygen. The leaf is created from silk and chloroplasts. This will help an astronauts go farther without a lot of oxygen containers. This innovation will solve the oxygen privation problems in spaceships. Moreover, we can decorate them around cities to increase the oxygen levels.