A Visualization Of Popular Opening Chess Moves Over Time

SEXPAND Theoretically, there are 71,852 positions that can be obtained in chess after each player’s fourth move, the vast majority of which are strategically useless. So where to start? This remarkable visualization shows how the opinions on this matter have changed over time. These graphs were put together by computer science graduate research assistant Randal Olson. He explored a data…

Pulse Detonation Engine

Rocket engines that work much like an automobile engine are being developed at NASA’s Marshall Space Flight Center in Huntsville, Ala. Pulse detonation rocket engines offer a lightweight, low-cost alternative for space transportation. Pulse detonation rocket engine technology is being developed for upper stages that boost satellites to higher orbits. The advanced propulsion technology could…