What is this picture?

Question

What is shown in this image?

Accepted Answer

cotton wool fibres. Cotton Wool Fun Fact Cotton wool fibres are so incredibly fine and crimped that they naturally trap air in a way that makes them one of the best insulators known to nature—which is why they're used in everything from wound dressing to spacecraft insulation. The crimps and convolutions in each fibre are so intricate that a single pound of cotton wool can have a surface area larger than 200 acres when you account for all those tiny air pockets!

Answer: cotton wool fibres