1) Atmospheric optical phenomena
Found on
https://www.crosswordclues.com/clue/sylvanshine
Sylvanshine is an optical phenomenon in which dew-covered trees of species whose leaves are wax-covered retroreflect beams of light, as from a vehicle`s headlights, sometimes causing trees to appear to be snow-covered at night during the summer. The phenomenon was named and explained in 1994 by Professor Alistair Fraser of Pennsylvania State Univ....
Found on
http://en.wikipedia.org/wiki/Sylvanshine
No exact match found.
