Circus elephants help clean up Joplin

Remarkable stop-motion video shows off the beauty of Peru and Bolivia. Video courtesy of Timelapse Media.

The Feed compiles some of the week's best viral videos, including a monkey hitting a dog with a lollipop, astronaut Chris Hadfield's good-bye tribute to the International Space Station and the Gregory Brothers' celebration of YouTube's eighth birthday. Plus, an adorable 2-year-old sings Pearl Jam with incredible accuracy.

Stunning time lapse video exhibits the relationship between Montreal, its residents and winter. Video courtesy of Stephane Hoareau and Timecode Lab.

An orphaned piglet on a Romanian farm was adopted by a mother cat with very maternal instincts when they were put together in the same atelier by their owners.

Check out the mysterious sliding stones of Racetrack Playa, some insane star trails, and pink aurora in this time lapse video of Death Valley. Video courtesy of Sunchaser Pictures.

The Feed compiles some of the week's best viral videos, including the best dance moves you'll ever seen on a treadmill, a seven-and-a-half-month-old learning to water ski, and cat who hates Lego Town. Plus, Ohio hero Charles Ramsey get remixed into a catchy and hilarious song.