Some religions, note science is not one of them:)

Taoism: Shit happens. 
Hinduism: This shit happened before. 
Confucianism: Confucius says, "Shit happens". 
Buddhism: If shit happens it isn't really shit. 
Zen: What is the sound of shit happening? 
Islam: If shit happens, it is the Will of Allah. 
Jehovah's witness: Knock, knock. "Shit happens." 
Atheism: There is no shit. 
Agnosticism: I don't know whether shit happens. 
Protestantism: Shit won't happen if I work harder. 
Catholicism: If shit happens, I deserved it. 
Judaism: Why does this shit always happen to us?