Researchers in Australia showed that a class of compounds called nitric oxide donors delays the entry of toxins from potentially deadly snakebites.
Helmets currently leave soldiers' faces unprotected, allowing explosive forces to blast through.
At least 20 levels of security are in place to thwart both terror attacks and troublemakers in the air.
An Israeli company is developing sensors capable of detecting explosive chemicals that bomb-sniffing dogs can miss.
Known as the Stingray, the liquid blade is already saving the lives of American soldiers in Afghanistan.
Scientists have replicated Superman's X-ray vision to see through clothing or packages in order to spot security threats.
Traits such as nationality, age, recently visited countries, and partial names will be used to screen passengers.