Dinaz Campbell, 10, holds Sherry, her newly adopted dog, at an adoption clinic in Rockville, Md. Marisa Penaloza/NPR hide caption

itoggle caption Marisa Penaloza/NPR

Researchers discovered ancient animal mummies piled up in heaps inside a catacomb. Many of the mummies were in poor condition. Courtesy of Paul Nicholson hide caption

itoggle caption Courtesy of Paul Nicholson

Allen Burnsworth, owner of Sit Means Sit Dog Training in Los Angeles, demonstrates how to fight off a dog attack with Flash, a trained 2-year-old Belgian Malinois. Allie Ferguson/NPR hide caption

itoggle caption Allie Ferguson/NPR

Actor Johnny Depp brought his dogs to Australia without first placing them under a mandated 10-day quarantine. Toshifumi Kitamura/AFP/Getty Images hide caption

itoggle caption Toshifumi Kitamura/AFP/Getty Images

State Sens. Warren Limmer (left) and Bill Ingebrigtsen talk in the Senate chamber. Limmer said he has been scolded for looking at his colleagues during debate before, and had "to beg forgiveness to the Senate president." David J. Oakes/Minnesota State Senate hide caption

itoggle caption David J. Oakes/Minnesota State Senate

A direct, friendly gaze seems to help cement the bond of affection between people and their pooches. Dan Perez/Flickr hide caption

itoggle caption Dan Perez/Flickr

The team with SAR Dogs Nepal performs many search operations in the Himalayas. Last year they rescued five foreign trekkers and about 200 Nepalis. Courtesy of SAR Dogs Nepal hide caption

itoggle caption Courtesy of SAR Dogs Nepal

Indiana "Indy" Bones reports for duty on a field investigation, in which the dog sniffs to detect human remains for a reopened cold case. Gloria Hillard/NPR hide caption

itoggle caption Gloria Hillard/NPR

In the dog mushing world, 44-year-old Lance Mackey is like Michael Jordan. The sled dog racing veteran returns to the Yukon Quest this year. Katie Orlinsky for NPR hide caption

itoggle caption Katie Orlinsky for NPR

Sled dogs prefer below-zero weather for running, says musher Cody Strathe. Some mushers now train at night, when it's colder. Courtesy Yukon Quest hide caption

itoggle caption Courtesy Yukon Quest

A dog named Sky activates the tug sensor on the FIDO vest. The vest is a piece of wearable technology designed to allow working dogs to perform more tasks and communicate more information. Rob Felt/Courtesy of Georgia Tech hide caption

itoggle caption Rob Felt/Courtesy of Georgia Tech