Although now in deep hibernation, there is still a chance that Philae could revive.
Of particular interest is the brown fat between the shoulder blades, known to assist the bats in warming up when they begin to leave deep hibernation in April.
"Consumers are in deep hibernation," C. Britt Beemer, chief executive of the America's Research Group, said, "and there is no sign that they will wake up this spring or that the retail outlook will pick up any time soon".
At this time of year, temperatures in Reykjavik hover around zero and the sun creeps above the horizon for just six hours a day, so its citizens could be forgiven for going into deep hibernation.
At present, the only way to bring a laptop to life quickly is to summon it not from a cold state, nor from deep hibernation (suspend-to-disk), but from standby mode (suspend-to-RAM), in which the last session is stored in memory.
Controllers also put the probe into a deep hibernation for almost 1,000 days as a way of conserving energy.
Hibernating lemurs live up to ten years longer than their non-hibernating cousins.Dwarf lemurs like Jonas were the most extreme examples in their study, spending up to half the year in deep hibernation in the wild.
This time, the syndrome woke up, as if from deep hibernation, to reveal its wildest form.
In autumn and winter the echidna shows periods of torpor or deep hibernation.
Unlike other hibernating mammals from temperate regions, which have to awaken regularly for a few days, dwarf lemurs experience five months of continuous deep hibernation (May through September).
