Since it became widely available for public use in the early 1990s, the Internet has proven to be amazingly useful for facilitating communication, distributing information, and sharing knowledge. Human society has already been changed by the Internet-and as new technologies develop, even more opportunities will be available to people online. However, some people have concerns about technology and privacy, the availability of new technology to everyone,...

Medical science is advancing all the time. Researchers are constantly trying to find new ways to help people to have long and healthy lives. Thanks to their work, doctors today can cure diseases, lessen pain, replace unhealthy limbs or organs, and help infertile couples have children. Doctors can even keep seriously ill people alive against all odds. But not everyone is enamored with advances in medicine. They question whether it is appropriate to...