SCIENTISTS have created "zombie dogs," reanimating the canines after several hours of clinical death in attempts to develop suspended animation for humans. US scientists have succeeded in reviving the dogs after three hours of clinical death, paving the way for trials on humans within years. Pittsburgh's Safar Centre for Resuscitation Research has developed a technique in which subject's veins are drained of blood and filled with an ice-cold salt solution. The animals are considered scientifically dead, as they stop breathing and have no heartbeat or brain activity. But three hours later, their blood is replaced and the zombie dogs are...