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(repeat) Changed your computer password recently?\xa0We all try to stay one step ahead of the hackers, but the fear factor is increasing.\xa0The risks can range from stolen social security numbers to sabotaging a national power grid.\xa0\nSixty years ago, when hacking meant nosing around the telephone network, it seemed innocent enough.\xa0And not all modern hacking has criminal intent.\xa0Today, there are biohackers who experiment with implanted electronic devices to improve themselves, and geoengineers who propose to hack the climate.\xa0But in our efforts to cool an overheated planet, might we be going down a dangerous path?\nIn this second of two episodes on hacking, the modern variations of \u201chacking,\u201d and their consequences. Plus: when does hacking a system improve it?\xa0\xa0\nLearn more about your ad choices. Visit megaphone.fm/adchoices