Sticking tape on a frosted glass makes it see through. Air and glass have a very different refractive index, so if you have a rough glass surface, the incoming light is scattered in all directions, thus blurring the image you see through it.
Tape has a similar refractive index as glass, so if you stick it to frosted glass, the sticky material will fill out the little bumps in the glass. The non-sticky side is practically flat, so by sticking tape to the frosted side of glass that’s frosted on one side, you are essentially making it flat again, and making the glass clear.
Sea Butterfly - Corolla spectabilis
Commonly referred to as Sea butterfly and also as Spectacular Corolla, Corolla spectabilis (Gastropoda - Thecosomata - Cymbuliidae) is a species of planktonic sea slugs, belonging to a group which are collectively called pteropods.
Corolla is characterized by having a single wing plate (those structures resembling wings), and a gelatinous internal pseudoconch which contains the visceral mass. The pseudoconch can grow to about 8cm in length in large animals, with a wing plate span of 16cm.
One of the most interesting features of these sea butterflies is their method of feeding. They produce a mucous web, many times the size of the animal and can have a diameter of about 2m, to entangle and trap planktonic food.
Photo credit: ©Arne Kuilman | Locality: Philippines (2013)
-gurgling noises- it’s so cool!