The cover story, "A Simpler Origin for Life", shows how energy driven networks of small molecules may be more likely first steps for life than the commonly held idea of the sudden emergence of large, self-replicating molecules such as RNA. Next, "Lifting the Fog around Anesthesia", which explains why current anesthetics are so potent - and sometimes dangerous - and how they will lead to a new generation of safer, targeted drugs. We'll also hear about "Restoring America's Big Wild Animals". Pleistocene "rewilding" - a proposal to bring back animals that disappeared from North America 13,000 years ago - offers an optimistic agenda for 21st century conservation. Finally, we'll explore "Seeing Triple". Anticipated for decades, machines are finally displaying objects in three true dimensions.
©2007 Scientific American