Problem: As the twenty-first century dawned, the five interrelated issues crucial in 1900 (see Chapter 1) were still major factors around the world. During the 1990s scientists probed deep into space in search of the possibility of life in other galaxies. By 1996 at scientists at NASA announced the discovery of microfossils on Mars and by 2004 were speculating that water and life might once have existed on that planet. Although these odysseys are far cries from the 30-minute flights of the Wright brothers' experiments. they indicate humanity's continuing quest to explore space and time. Despite these achievements. nts, contemporary societies continue to face the paradox that while technology offers the possibility of incredible advances, there is a growing threat to the continued existence of life on earth. At the same time that scientists on such as Professor Stephen Hawking at Cambridge University in England might be close to explaining the creation of the universe, major human-induced environmental crises such as global warming (the greenhouse effect, largely caused by carbon dioxide released through the burning of fossil fuels) and the depletion of the ozone layer (largely caused by chlorofluorocarbons [CFSs]) defy easy solutions. One U.S senator summed up the feeling of many when he remarked, "We only have one planet If we screw it up we have no place to go. Analyze what this is saying please. Need Assignment Help?