than the holders in the tray. How is this possible?
H2O is the only substance that expands rather than
contracts on freezing. In effect, crystalization is like
taking a family picture with everyone with their hands
on their hips: folks end up taking up more space.
There are consequences to this; for a given volume, ice
weighs less than water. And when ice melts quickly, one
can end up with too much weight on parts of a building
as water gathers.
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