Self-reproducing machines

Departments of *Mechanical & Aerospace Engineering, †Computer Science, ‡Mathematics and §Computing & Information Science, Cornell University, Ithaca, New York 14853, USA e-mail: [email protected]

Supplementary information accompanies this communication on Nature's website.

Nature 435(7039):p 163-164, May 12, 2005.

A set of modular robot cubes accomplish a feat fundamental to biological systems.