Inspecting letters with terahertz waves

Is it a harmless parcel or a bomb, an innocent letter or a drug shipment? A new terahertz scanner is capable of detecting illicit drugs and explosives sent by post without having to open suspicious packages or envelopes.

Bomb scares: An ODD solution

For anyone who has spent a significant amount of time in an urban setting, the scene of a bomb squad responding to a report of a suspicious package might be all too familiar. But just how is it determined that the lunchbox ...