The rays cause melanocytes to produce more melanin. However, if the skin is overexposed to UV radiation, the melanocytes may change or experience abnormal growth, which causes cancer [source: Melanoma ]. Melanoma is the most serious form of skin cancer, and it can spread quickly and appear anywhere on the body.V radiation can also cause cataracts and weaken the immune system [source: AAD: Exam ]. But UV radiation is probably most notorious for causing various forms of skin cancer.
For other uses, see Iago (disambiguation). Iago is a fictional character in Shakespeare's Othello (c. 1601â1604). Iago is the play's main antagonist, and Othello's standard bearer. He is the husband of Emilia, who is in turn the attendant of Othello's wife Desdemona. Iago hates Othello and devises a plan to destroy him by making him believe that his wife is having an affair with his lieutenant, Michael Cassio.
Othello is the most famous literary work that focuses on the dangers of jealousy. The play is a study of how jealousy can be fueled by mere circumstantial evidence and can destroy lives. (In Othello, the hero succumbs to jealousy when Iago convinces him that Desdemona has been an unfaithful wife â in the end, Othello murders his wife and then kills himself.) It is interesting that Iago uses jealousy against Othello, yet jealousy is likely the source of Iago's hatred in the first place. In Othello, jealousy takes many forms, from sexual suspicion to professional competition, but it is, in all cases, destructive.