One way that cancer can form is when abnormal cells have uncontrolled growth, old cells die and get added on to which I believe creates tumors.
A classification system is a system with a distribution of classes created according to common relations.
Hi! I believe that the lasers are used for measuring the earthquakes movement and how much worse it is going to be with the next earthquake. But they would also measure how much force there was and how much more or less there will be. :) Hope this helps. :)