Meaning: if you find out about something, you discover a fact or information that you did not know before, often because someone was keeping it secret.
如果你find out about sth，就是说你发现了某个真相或者某些你之前不知道的信息，通常这些真相或信息是别人可以隐瞒的。
Grammar: this phrasal verb needs an object. You can not separate the verb from its particles.
He found out about the theft - RIGHT
He found out about it - RIGHT
He found the theft out about - WRONG
He found it out about - WRONG
He found out the theft about - WRONG
He found out it about - WRONG
