Musk's past tweets reveal clues about Twitter's new owner

He may be good with rockets and electric cars, but don't turn to Elon Musk for public health predictions.

It's one of many tweets that offer a glimpse into the mind of Twitter's new owner and moderator in chief. Playful, aggressive and sometimes reckless, Musk's past tweets show how he has used social media to tout his businesses, punch back at critics and burnish his brand as a brash billionaire who is unafraid to speak his mind.

Musk joined Twitter in 2009 and now has more than 112 million followers — the third most of any account after former president Barack Obama and Canadian singer Justin Bieber. He had long mused about purchasing the platform before the $ 44 billion deal was finalized last week.