A few years back a team developed a terahertz detector - rigged it up to a camera and everything was pretty neat.
Then recently a Swedish team developed a quantum cloaking device:
In practice, this means designing quantum corals, elliptical nanostructures, that absorb terahertz waves of specific frequencies. When a molecule that emits this frequency is placed at the focus, it cannot be spotted. It is essentially invisible.
What this means to me - is that e still equals mc^2. In other words, energy IS matter, and though messy and antiquated machines of destruction are very much a threat - it may be possible in the future to "unmake" matter utilizing quantum mechanics, and a massive amount of energy.
Ok, I've officially scared myself.
