Jan. 10, 2012 - August 15th, 1973 This heat rather gets you down. Photo Shows: Polar bear Sam, father of the London Zoo's popular Paddywack takes a nap in the afternoon sunshine today.

- Image ID: E12GDY
Jan. 10, 2012 - August 15th, 1973 This heat rather gets you down. Photo Shows: Polar bear Sam, father of the London Zoo's popular Paddywack takes a nap in the afternoon sunshine today.
Keystone Press / Alamy Stock Photo
Image ID: E12GDY
Jan. 10, 2012 - August 15th, 1973 This heat rather gets you down. Photo Shows: Polar bear Sam, father of the London Zoo’s popular Paddywack takes a nap in the afternoon sunshine today. (Credit Image: Keystone Pictures USA/ZUMAPRESS)