Infrared may be detected at a distance from the radiating objects by "feel." Infrared sensing snakes can detect and focus infrared by use of a pinhole lens in their heads.
infrared | Snakes on a Plane | Infrared spectroscopy | Infrared Processing and Analysis Center | Infrared | remote sensing | Wide Field Infrared Survey Telescope | Television Infrared Observation Satellite | Remote sensing | Infrared Roses | Fourier transform infrared spectroscopy | These Arms Are Snakes | the Deadly Snakes | Sensing Murder | Near-infrared spectroscopy | Infrared heater | infrared astronomy | Hot Snakes | Gornergrat Infrared Telescope | Baby Snakes | These Arms are Snakes | The Deadly Snakes | The Company of Snakes | Stratospheric Observatory for Infrared Astronomy | Snakes On A Plane | Snakes & Arrows Tour | Snakes and Ladders | Snakes and ladders | snakes and ladders | Sensing |