Some celebrities tweet sweet messages to their fans, some tweet suggestive self-portraits ... but not Jose Canesco. When he's not spouting tweets about global warming, he offers his theories on the profound nature of physics. Known more for home runs and steroid use than critical thinking, the quirky Canseco had this to say about the force that keeps us all grounded:

Jose Canseco ponders gravity via Twitter
The former MLB slugger weighs in on Newtonian physics.