Water is crucial to forming life as we know it. But do we understand where Earth water came from? We can observe the birth sites of new planetary systems, so called planet forming disks around young stars with ground and space-based telescopes in tremendous detail. This enables us to learn how much water and also ice is there at times that the planets are being assembled. I will explain in this seminar how we combine computer simulations with cutting edge observations to learn how and where water is forming in space. In the end, these studies will shed light on how water may have originated on Earth and helped life to emerge.