An Informal Review of Space Exploration - Kbog. A critical look at the value of space exploration.
Space Debris - Creon Levit. Presentation about the millions of space debris particles clouding the orbit of Earth.
Why The Risks of Space Collusions is Skyrocketing - Moriba Jah. On space collusions, debris, and what to do about them.
The Cosmic Zoo - Dirk Schulze-Makuch.
Colder Wars - Gwern. On the game theory of space war.