Describe smartphone apps that recognize signs of depression. Describe how they work and how they might be helpful. Do you think these apps are a good idea? Why or why not? Use facts and details from the Article in your answer.

Above is a picture of one of the most famous discoveries ever to be found in china. answer the following questions: - what does the picture show? - when and where was it discover? - who discovered it and what was he doing when he/she discovered it?