And yes, sometimes scientific or historical data is wrong or unclear or in need of further examination. Everyone knows water expands when it freezes. Do you know why it does that when literally nothing else in the world does? Nope, and neither does science.
That's wrong.
Gallium expands (quite a lot) on freezing. https://www.youtube.com/watch?v=vJMEhdvz1BY (2:46)
I believe there are other things that do as well.
Cheers,
Scott.