Water expands when frozen. When freezing water, the molecules lose their energy and hold still. This causes more stable hydrogen bonds that form between the water molecules. These additional molecules are what cause the water to expand when frozen.
100 Mind-Blowing Bonds Facts
Male gentoo and Adelie penguins “propose” to females by giving them a pebble. These are precious because the penguins use them to build their nests, and they can be hard to find along the barren Antarctic shoreline. If the female accepts the pebble, the pair bonds and mates for life.
Lego toys are a better investment than stocks, bonds, or gold.