Frozen Planet films showing baby turtles and an Arctic bumblebee which can freeze solid during winter then thaw out in spring is being used by scientists researching human medical advances.
On Sunday viewers will see the extraordinary feat performed by the different creatures from different parts of the world.
The baby painted turtles, filmed in the Northern Forest of the US and Canada, hatch in the autumn and then become frozen solid in their nest chambers during the winter months. Their hearts stop and their brains remain only faintly active.
