I think that it completely depends on what you're talking about. If it's something scientific, then yes it can be. If it's something that isn't then it shouldn't be explained scientificly. Soooo....no? I don't believe that everything does.
Not everything should either. Feelings for example, if they we're explained then they wouldn't have as much meaning as we take them to have.
In other words, no. If love was explained with some chemical sequence, would it feel like love to you anymore?
bored