Fun Fact: How do bees see in the dark hive?

Fun Fact: When building combs in the darkness of the hive bees don't use their eyes to tell their position in the hive, whether they are standing vertically facing up or down, etc.
Bees have cushions of sensory (feeling) hairs at all their joints (knees and ankles etc) which move by gravity all together as the bee moves - sort of like how seaweed would sway in the waves back and forth.

This aids the bee to know in which direction they are standing by how these hairs move back and forth.

(taken from Jurgen Tautz book The Buzz about Bees - this book has incredible macro photography of the bees).