There is one question that has been bothering me sometimes the last couple of years that I want to share.
There are two statements that I believe are true. A) snow's natural color is white B) snow of white color melts under sun the slowest.
This, to me, seems like something that cannot be a coincidence, but rather some sort of result of an evolutionary process of the snow crystal, but that sounds silly because it is not a living organism. Anyway, I can't seem to resolve this paradox.
To motivate this a little better, I would guess that if snow were a shade even a little darker than white, the ice caps probably would've already melted,because from what I know, white snow reflects something like 99,...% of light, and even a small increase in relative light absorption will increase heat absorbed by many times.
Hope this makes sense