An unmanned U.S. Predator drone flies over Kandahar Air Field in southern Afghanistan on Jan. 31, 2010. Drones have become the U.S. weapon of choice in the fight against terrorism. But as the technology of this new form of warfare improves, so do concerns about how others will use it in the future.
Without question, drones have become the U.S. weapon of choice in the fight against terrorism. Counterterrorism officials say they've come to rely on the pilotless aircraft for their surveillance capability and what officials say is precision targeting. That reliance has led to greater use in the past couple of years, especially in Pakistan and Yemen.
John Bellinger, a State Department legal adviser during the George W. Bush administration, says there are increasing concerns about the frequency of drone attacks.
When wildfires swept across Australia in February 2009, this photo of a firefighter sharing his water with an injured koala captured hearts around the world. The koala later died — not of fire-related injuries, but of chlamydia. Koalas in Australia are suffering from an epidemic of chlamydia, says Dr. Barbara Natterson-Horowitz. "There's no such thing as safe sex in the wild."
Credit Mark Pardew / AP
Cardiologist Barbara Natterson-Horowitz has worked at the UCLA Medical Center for more than 20 years. She is also a cardiac consultant for the Los Angeles Zoo.
Credit Joanna Brooks /
Science journalist Kathryn Bowers writes about health, biology and evolution. She teaches writing at UCLA.
When Dr. Barbara Natterson-Horowitz was asked to treat an exotic little monkey with heart failure at the Los Angeles Zoo, she learned that monkeys can suffer heart attacks from extreme stress — just like humans. That's when the cardiologist realized she'd never thought to look beyond her own species for insights into disease.
When we asked whether the Occupy movement has "crashed or just begun," "Rock Trimlove" took issue with our image of a protester in the Guy Fawkes mask, pointing out that the mask was worn by hacker group Anonymous "long before the 'Occupy' movement began." Ultimately, however, the commenter found the picture to
Audience members listen to President Obama speak about immigration reform in El Paso, Texas, in May 2011. The Obama campaign is wooing Hispanics ahead of the November elections, but the president's deportation policy is being criticized by immigrant advocates.