What things can you describe as marvels of modern science?And why

In my opinion, I consider the mobile phone as a marvel of modern science. It gives us an opportunity to communicate with people from all over the world. You can sit at home and call to your relatives who live in thousands kilometers from you. The mobile phone is very helpful invention. Due to it, we can talk with our family at any time. Moreover, it is useful for our job, because the mobile phone saves our time.