More about 'Flexoelectricity' here:

https://www.nature.com/articles/s41567-025-02995-6

One more surprise in the 'ice' category ... which is now up to 19 forms. (Know of any other solids which float on their liquid form?)

https://en.wikipedia.org/wiki/Phases_of_ice#Known_phases

"The details of the chemical nature of liquid water are not well understood; some theories suggest that its unusual behavior is due to the existence of two liquid states." - WP