In a remote corner of Finland near the Arctic Circle, an international team of elves helps Santa respond to hundreds of thousands of letters from children around the world.
New insights into the animals intimate encounters include species that cut holes into their partners for sex, squid that swap genders, and males that deploy flesh-burrowing sperm.
Bizarre prehistoric creatures--sea monsters, gargantuan rodents, a redheaded Neanderthal--are among the stars of the most read stories on dinosaurs and fossils by National Geographic News in 2008.
See National Geographic News's most popular individual photos of 2008, including pictures of a giant stingray, a "smiling" sky, a lizard-snake standoff, and more.