Secrets of the hive
From Richard Hammond's Invisible Worlds
The ability to capture and display the inner workings of a bee hive in infra-red reveals yet more extraordinary behaviour. It's long been known that bee colonies are highly organised, but their sophistication seems to go ever further. Here, specialised 'heater bees' maintain temperature in the brood and determine the futures of the developing grubs. Here too, the reason for all the frenetic activity performed by bees becomes clear.