James Dreben 
#ELI5 Why is water see through?
I'd never thought about it like this. Wow.
Russ Garrett@Jdreben strikes me that it's a smaller-scale version of the anthropic principle - we only exist because this is the case so it has to be true.
@Jdreben strikes me that it's a smaller-scale version of the anthropic principle - we only exist because this is the case so it has to be true.