MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Hoar frost on spider's web. Hoar frost forms in a similar way to dew, in that water is deposited from air that is supersaturated with water vapour. This can occur when moist air cools rapidly. The difference is that the temperature of the deposition surface is below the freezing point of water, and ice crystals form. Hoar frost forms in still, clear and cold weather. Here, the air temperature was around minus 7 degrees Celsius. The spider's web retains its shape despite the extra loading of the ice crystals, showing the tensile strength of spider's silk.
Model release not required. Property release not required.