A silicon strand is lowered from the ceiling, alongside hundreds of others. Beautiful though these threads are, they have a sinister purpose. To trap its prey it [the cave glow worm] goes fishing with a line of silk. That ghostly blue light is the result of a chemical reaction taking place inside a special capsule in its tail... Insects seem irresistibly drawn towards the source and then get trapped by the sticky lines. Once stuck, there is no escape. Now it's just a matter of reeling in the line and slowly consuming the catch - alive. By ensnaring the insects that hatch in this cave, these glow worms have solved the biggest challenge that permanent cave dwellers face finding a regular and reliable source of food.
