Two presentations I like the most

My two favorites presentations are snap chat and 3D printer the Lunar base. I really like to use snap chat so i like the student's presentation. Everything she presented is farmilar to me and she also talks about many things that i don't know about it such as there are more than 300 people in their company, and facebook wanted to buy their company but they refused facebook. these are attractive news to me. I like the presentation about 3D printer the luna base too. First i really like his PPT slides. That is really cool and different from the others. And he gave a really clear video to show how 3D printer scan and print the lunar base as well.