A routine heart drug shows promise as a way to blunt bad memories
By Michael Rosenwald
Posted 05.01.2006 at 2:00 am 0 Comments
Clinical psychologist Alain Brunet of McGill University in Montreal doesn´t usually torture his patients. But lately he has been pressing those with post-traumatic stress disorder, or PTSD, to relive emotionally scarring incidents. For some it´s rape, others battlefield trauma. When his patients get particularly upset-crying, shaking, blood pressure rising-he gives them a 25-year-old hypertension drug called propranolol. The idea, though, is not to lower their blood pressure.
Rockets burn for mere minutes. This engine runs for years, sending probes to Neptune at 10,000 miles an hour
By Michael Moyer
Posted 03.15.2006 at 3:00 am 1 Comment
NASA's Ion Engine
1. Charge the Fuel
Xenon is an inert gas, seemingly useless for rocketry. Before it´s used as fuel, the engine must convert it into an electrically charged gas, also called a plasma. An electron emitter fires electrons at the xenon gas. When an electron hits a xenon atom, it strips off an additional electron from the atom´s shell to create a positively charged xenon ion.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.