Recently on Twitter:

• Raul Ruiz: Harvard Scholar and emergency physician vies for political office in Southern California http://t.co/5eDo11oC
  
  07:43 AM Jan 19th from Tweet Button
• Greg Henry – A new spin on old physics lessons http://t.co/0QxkDqMR
  
  10:00 AM Jan 11th from TweetMeme