This sounds like a more practical version of David J. Stevenson's 2003 earth probe proposal: http://news.nationalgeographic.com/news/2003/05/0514_030514_earthco

This sounds like a more practical version of David J. Stevenson's 2003 earth probe proposal: http://news.nationalgeographic.com/news/2003/05/0514_030514_earthcore.html http://news.nationalgeographic.com/news/2003/05/0514_030514_...