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
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