Image Credit: QinetiQ 100 GHz Millimetre Wave
Superhuman Vision: Seeing with Terahertz
Terahertz radiation revealed the knife hidden in the newspaper (hi-res version). This part of the electromagnetic spectrum lies between the short-wavelength radio waves and the long-wavelength infrared (way out beyond the visible). For more information, see Superhuman Vision: Seeing with Terahertz. For a teravision image of a tooth, see T-Ray Triumph from the American Physical Society's Physical Review Focus.
The Pervasive Plasma State
Ninety-nine percent of the matter in the universe is plasma. To learn about it, visit The Pervasive Plasma State and Perspectives on Plasmas.
(This feature was updated on July 5, 2013.)