“Hippo Chase”. As we approached the camp the Selinda Reserve of northern Botswana our boat passed by a hippo resting in the water. I turned around to look back at the boat's wake and saw the hippo charging after us! The hippo must've been tired from an all-nighter because he was angry. He rose way up out of the water three times trying to chase our boat! He was coming at us with such force that he created a wake of his own. Photo location: Selinda Reserve of northern Botswana. (Photo and caption by Curtis Simmons/National Geographic Photo Contest)

“Spa treatments don't stop with people. You won't see any aromatherapy candles around, but animals get massages, too, and it's become a regular service that many pet owners value as more than just glorified petting. Practitioners say massage can be a preventive measure for younger animals and rehabilitative for older ones by boosting flexibility, circulation and immunity”. – Terry Tang via The Associated Press. Here: in this November 6, 2014 photo, Shelah Barr of Happy Hounds Massage gives a massage to Dewie, 2, at the home of Laurie Ubben in San Francisco. (Photo by Jeff Chiu/AP Photo)

Some artists want to convey some deep message through their art, while some are simply satisfied with shocking the audience. Roderique Arisiaman is the latter kind. Though his works do not play on the strings of our emotion, they can pique the interest with their flashy and sometimes humorous appearance. Many of his works have a zombie theme, and are surprisingly well done, especially the one where a man pushes his fingers through his cheek and into his eye. If given the chance, Roderique Arisiaman would probably do a great job of designing a poster for some zombie apocalypse movie. (Photo and caption by Roderique Arisiaman)

Wearing his new prosthetic legs Hero gets a taste of shrubbery Wednesday, May 21, 2014, in Houston. The abandoned calf rescued from a Virginia farm a year ago and brought to Texas after it nearly died is getting permanent prosthetics to replace back hooves that had to be amputated because of frostbite. (Photo by Pat Sullivan/AP Photo)

A surfer heads out at Coldingham Bay an inlet in the North Sea on February 15, 2012 in Coldingham, Scotland. (Photo by Jeff J. Mitchell/Getty Images)

A tearful Beatle lover pleads unsuccessfully with a policeman to carry her fan button to Ringo, one of the four mop-top singers who drew squeals and shrieks from more than 30,000 spectators at two Indiana State Fair shows in Indianapolis on September 4, 1964. (Photo by Bob Daugherty/AP Photo)

Schoolchildren look at a lifelike animatronics display of a dinosaur at the dinosaur-themed Zoo-rassic Park in Singapore on November 16, 2016. To raise awareness on the sixth mass extinction, the Singapore Zoo and River Safari displayed lifelike dinosaur animatronics where visitors can trail along the Dinosaur Valley which does not involve living animals. (Photo by Roslan Rahman/AFP Photo)

Models blow kisses backstage at the Red Beard show during MBFWI presented by American Express Fall/Winter 2014 on March 13, 2014 in Istanbul, Turkey. (Photo by S. Alemdar/Getty Images for IMG)