rock. It’s been dead for nearly four billion years. And—inasmuch as a dead rock wants anything—it wants you dead too. So you can go quickly. A landslide can bury you. A lava tube can collapse on you. You can plunge headlong into a crater. A meteoroid can strike your habitat at seventy thousand kilometers per hour. A micrometeorite can bust open your spacesuit. A sudden burst of static electricity can blow you apart in an airlock. A slip, a cut, a ruptured seal, a faulty oxygen tank can kill you
