Before revision: It also features in various stories by Greg Egan such as Schild's Ladder .
After revision: , where he proposes the idea of a "strong bullet" which overcomes the instability of high atomic weight femto-structures by being accelerated to near light speed, letting it travel interstellar distances before impacting a target and constructing a stable nano-scale structure as it decaysIt also features in various stories by Greg Egan such as Schild's Ladder .