Three Troglodyte space travelers were running low on life support in their tiny landing pod so they decided to touch down on a little asteroid that seemed to be supporting some kind of life. Attempts to communicate with the outpost were met with incomprehensible mumbles. But a single symbol came through to their monitor, an image of a brain. Taking that as a sign of intelligence and taking intelligence as a sign of kindness and humanity, the Space Troglodytes touched down on the asteroid hoping to find respite and resources. They politely sent back an image of an open door.