Santa's Reindeer Feel the Heat as Numbers Shrink Worldwide

"The reindeer population in the world, and caribou, are declining pretty rapidly," study co-author Andrey Petrov, a geographer at the University of Northern Iowa, said here today (Dec. 12) at a news briefing at the annual American Geophysical Union Meeting. "We don't know why it's happening."

http://www.livescience.com/57180-russian-reindeer-populations-declining.html