Within a few dozen light years of the Sun, the sky is crowded with stars that could, in principle, host living worlds. I want ...

In the late 1950s, Project Orion proposed a spacecraft driven by rapid nuclear pulses, a pusher plate, and shock absorbers, with designs ranging from an eight crew ship to a city sized interstellar ...

Research on system architecture has proved a very fundamental tradeoff that applies to ubiquitous connectivity. It tells us ...