2013 Event Iran experiences a 5.6-magnitude earthquake 35 miles from the Bushehr nuclear plant, raising concerns over the risk of radioactive leaks in the event of a major earthquake; seven people die and 30 are injured 2013 Event Palestinian investigators claim their former leader, Yasser Arafat, did not die of old age or ill health; they believe Israel killed him because his exhumed body contained high levels of the radioactive element polonium-210 2013 Event Reports citing leaks of radioactive water from the Fukushima nuclear plant lead South Korea to ban all fishery imports from eight of Japan's prefectures 2013 Event Japan reports on the International Nuclear Event Scale that they've upgraded the leak of radioactive water at the Fukushima nuclear disaster site to Level 3, a 'serious incident' 2013 Event In Washington state, six tanks are reported to be leaking radioactive waste at the Hanford Nuclear Reservation; the leak has not posed an immediate health risk 2011 Event Tests show radioactive cesium is present in small quantities in residents of Iitate and Kawamata, Fukushima, towns located 25 miles from the Fukushima Daiichi nuclear power plant 2011 Event In Tokyo, the Metropolitan Government Bureau of Waterworks reports that radioactive iodine in city tap water is two times the recommended level for infants 2007 Event Earthquake in Japan damages nuclear power plan releasing 300 gallons of radioactive water 1983 Event Russian radioactive satellite falls into Indian Ocean 1951 Event 1st battery to convert radioactive energy to electrical announced 1936 Event 1st radioactive isotope medicine administered, Berkeley, California 1936 Event 1st radioactive substance produced synthetically (radium E) 1902 Event Marie and Pierre Curie isolate radioactive element radium 1902 Event Marie and Pierre Curie isolated the radioactive element radium