First robot moved by muscle power
by John Catsoulis
Related link: http://www.newscientist.com/news/news.jsp?id=ns99994714
A silicon microrobot just half the width of a human hair has begun to crawl around in a Los Angeles lab, using legs powered by the pulsing of living heart muscle. It is the first time muscle tissue has been used to propel a micromachine.
Read about it at New Scientist.