Inspiration for space exploration can come from all corners. One of the most inspiring, or terrifying, sources of inspiration for some in space exploration came from computer science expert John von ...

Alien probes could be hiding among us in plain sight as we search for them in the wrong places. This is the theory of professor Alex Ellery of Carleton University who argues that if self-replicating ...

The article on the power of biological computers as self-replicating, low-energy systems, capable of computation and problem solving, brought to mind von Neumann probes (10 June, p 36). These are ...