From publisher blurb: Hazards in this PDF include: Stellar Hazards Dark Matter Cloud Deep Space Wave Orbital Swarm Radio Echo Xenobiological Hazards Corrosive Membrane Cybernetic Slime Gene Mold Gravitational Fog Jefferson's Roots Mecha Rot Nanite Slime Space Fog Space Slime Pool In addition to the previously listed hazards, Future: 13 Xenological and Stellar Hazards also includes two new diseases and a creature from a previous OGC source.