Tiny bubbles that make icicles hazy are filled with water, not air
Like tree rings, layers of water pockets also preserve a record of an icicle’s growth
![In this image of an icicle, turned on its side, fluorescent green dye reveals where the contamination ends up.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/12/120822_jr_icicle-sci-vis_feat.jpg?fit=1030%2C580&ssl=1)
Even minute amounts of contamination in water are enough to make icicles grow ripples, a study finds. In this image of an icicle, turned on its side, fluorescent green dye reveals where the contamination ends up.
J. Ladan and S. Morris/University of Toronto