Lasers can cause damage in biological tissues, both to the eye and to the skin, due to several mechanisms. Thermal damage, or burn, occurs when tissues are heated to the point where denaturation of proteins occurs. Another mechanism is photochemical damage, where light triggers chemical reactions in tissue.
March 9: Teams are allowed to begin negotiating with other teamsâ players who are set to become unrestricted free agents at the end of the league year. This is the first time the NFL is providing a window to negotiate with other teamsâ free agents prior to the start of free agency.
fantasy football. 2017 NFL free agency: Fantasy football live blog NFL free agency is heating up. Players are signing and getting traded all over the place, with big fantasy football implications. We'll keep you up-to-date with all of the relevant signings and impact here. Read.