In this November 28, 1966 file photo, one of the 10 beagles involved in the first test of the Veterans Administration Hospital in East Orange, N.J. smokes a cigarette through a machine linked to its windpipe by a plastic tube to test any link between smoking and emphysema. (Photo by AP Photo)

White lioness Azira lies in the cage with her three white cubs, on February 4, 2014. Zoo owner Andrzej Pabich says white lions often have defects that prevent giving birth, or the mother rejects her cubs, but Azira has been patiently feeding and caring for her little ones. (Photo by Czarek Sokolowski/Associated Press)

“I was doing some event shooting for Bar One's Beer And Wine garden. I was working with these two ladies when all of a sudden I hear an "excuse me” and I see dude step into the frame right when I pressed the shutter button!” (Photo by 17thletter Photography)

With more than 40,000 followers on Twitter and 26,400 fans on Vine, it looks like Marutaro the hedgehog from Japan is one of the most popular hedgehogs on the Internet. And as his owner keeps on posting Marutaro’s pictures online daily, Marutaro’s popularity continues to grow. There are hundreds of cute photographs and videos of this little fellow, but the ones with little paper cut-out faces are probably the cutest. As Marutaro lies on his back, his owner gives him a variety of silly expressions and smiles. The 20 best of them will definitely boost your mood!

Dancers wearing masks and kimonos perform in the streets at the “Super Yosakoi 2015” dance festival in Tokyo on August 30, 2015. One hundred dance teams with some 5,500 people participated in the two-day summer festival event. (Photo by Yoshikazu Tsuno/AFP Photo)

A United States Secret Service agent fights with the wind as Marine One with United States President Joe Biden on board departs from the White House in Washington to Ottawa, Canada on March 23, 2023. (Photo by Rex Features/Shutterstock)

The fairy chimneys are seen with light illuminations created with different techniques in Cappadocia, Nevsehir, Turkiye on August 01, 2024. Fairy chimneys are formed by volcanic eruptions and erosions over millions of years and are considered as one of the unique characteristics of the geography. (Photo by Harun Ozalp/Anadolu via Getty Images)

A view of the wheel of the car of First place British driver Lando Norris of McLaren F1 Team after the Singapore Formula One Grand Prix at the Marina Bay Street Circuit, Singapore, 22 September 2024. (Photo by Tom White/EPA)