This is Scientific American's 60-Second Science. I'm Steve Merskey. Got a minute? Some strong comments from John Holdren, director of the science technology and public policy program in Harvards JFK school of government. Saturday, the annual meeting...
Have you recently been poking your friends, twittering , or blogging ? Well, according to a recent report from the global research company Nielson, you are most definitely not alone. The report says that social networking and blogs have now become mo...
It has been 10 years since the birth of Napster and the global spread of file-sharing sites. Back in 1999, Shawn Fanning, then a 19-year-old student, could never have predicted the extent to which his simple computer program would change the music in...
Amateur 'ham' radio operators don't need web cams or the Internet to chat with people all over the world Matt Sepic | St. Louis, Missouri 20 April 2010 Helen Schlarman, 89, has multiple sclerosis and says ham radio lets her connect with friends she's...
U.S. National Research Council calls for more exploration Rosanne Skirble | Washington, DC 08 April 2010 Photo: Smithsonian National Museum of Natural History Rick Potts has led excavations at early human sites in the East African Rift Valley, and cu...
VOA's weekly science and technology radio magazine Art Chimes | Washington, DC 02 April 2010 Related Links Angkor paper (PNAS Buckley lab Racial disparities paper (Pediatrics) Songbird genetics (Nature) Global Climate Change (NASA) Inventors Hall of...
从下面选项中选择正确答案；单击核对答案按钮，核对你的答案. Your score: 0/6 Your score: 1/6 Your score: 2/6 Your score: 3/6 Your score: 4/6 Your score: 5/6 Your score: 6/6 1 : Mobile devices are often described as ________ b...
从下面选项中选择正确答案；单击核对答案按钮，核对你的答案. Your score: 0/6 Your score: 1/6 Your score: 2/6 Your score: 3/6 Your score: 4/6 Your score: 5/6 Your score: 6/6 1 : I just sent an email to Ralph and got his ______...
从下面选项中选择正确答案；单击核对答案按钮，核对你的答案. Your score: 0/6 Your score: 1/6 Your score: 2/6 Your score: 3/6 Your score: 4/6 Your score: 5/6 Your score: 6/6 1 : Breakthroughs in __________ could mean that we s...
