THE SCIENCE— AND ART-OF 
Keeping 
Warm 
To survive the assaults of cold weather, 
the organisms that inhabit the earth 
rely on a wide variety of strategies: 
plants may drop their leaves; some 
animals fluff their feathers, while others 
hibernate; and human beings can choose 
to stoke the furnace, don a sweater, 
or even head for the nearest hot tub. 
This special issue of Natural History 
celebrates the diversity of ways in which 
life’s battle against the cold is won. 
