How do you make #heart tissue out of a single cardiac cell in a Petri dish? #Love this story here: http://bit.ly/zQBhB8 (2nd story down)
5:45 AM - 14 Feb 2012
0 replies
5 retweets
0 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.