Watch A Machine Tell The Difference Between Soda And Liquid Explosives �The problem with liquid explosives besides being explosive is that they often look just like non-explosive liquids. Since 2006 to protect against the threat of those explosives people traveling by air in America have been limited to one �quart-sized bag for liquids each �in a container no larger than 3.4 ounces. That size �limit has at best �a �questionable impact on safety but a new device being developed by �Los Alamos National Laboratory could eventually make the scanning process less painful. Called the MagRay it's designed to scan liquids and quietly differentiate between the safe and �unsafe. And now Los Alamos has released a video showing off the tech. �The MagRay essentially combines an X-ray �and an MRI to differentiate between say a soda and something more suspicious. Liquids are placed into the scanner which according to LANL researcher Larry Schultz can give of a measure of how �sludgy a liquid is an indication of what might be inside the can or bottle. �Another measure is �X-ray density or how difficult it is for X-rays to show through the liquid. With that data the machine paints a fairly distinct portrait of the liquid and a simple computer interface shows the most important information about �the liquids in �a giant colored circle: red for unsafe green for safe and more details presented alongside. The research is supported by the Department of Homeland Security and it's easy to see how an airport security checkpoint in the future could employ a �liquid-scanning device like the MagRay.The device has been in development since �at least 2007 but �it still may �be a few years before MagRays can scan Thanksgiving travelers' homemade gravy.