A vibrating tennis to guide blinds. Is it helpful?

Close your eyes and imagine how life of a blind person is. Who has never played this game in order to better understand the challenges people with visual limitations face.? How do they know where they are going? How do they know where to turn left or right? Lechal was born as a smart shoe to help blinds by using geo-sensitive technology to vibrate and show the path. Is it helpful?

How 3D printers can help India to save oxygen

Manu Prakash, a professor of bioengineering at Stanford University, has developed a Project basted on 3D printed engineering that allow to save up to 50% of oxygen in a tank . This is possible because during oxygen therapy, when a patient exhales, oxygen is still being supplied and is thus wasted.