Going toe-to-toe, these fighting primates could give Floyd Mayweather a run for his money. The amazing images – captured by Australian tourist Julie Rathbone on the banks of the Zambezi river in Africa – show the pair engaging in a few fisticuffs. The Chacma baboons appeared to settle a disagreement by fighting – before a senior baboon plays referee and steps in to break it up. Nurse unit manager Julie Rathbone, 59, from New South Wales, was on a cruise down the river when she spotted the fracas unfolding. (Photo by Julie Rathbone/Caters News)

Actor Bryan Cranston engages Julia-Louis Dreyfus in a prolonged kiss as she takes the stage to accept the award for Outstanding Lead Actress In A Comedy Series for her role in HBO's “Veep” during the 66th Primetime Emmy Awards in Los Angeles, California August 25, 2014. (Photo by Mario Anzuoni/Reuters)

An Armatix employee holds a “smart gun” by the company at the Armatix headquarters in Munich May 14, 2014. The gun is implanted with an electronic chip that allows it to be fired only if the shooter is wearing a watch that communicates with it through a radio signal. If the gun is moved more than 10 inches (25 cm) from the watch, it will not fire. A Maryland gun shop owner has dropped his plan to be the first in the United States to sell the so-called “smart gun” after a backlash that included death threats. (Photo by Michael Dalder/Reuters)

Drummers perform during rehearsals at the Bird's Nest National Stadium ahead of the IAAF Athletics World Championships in Beijing on August 20, 2015. The Athletics World Championships will be held at the stadium from August 22 to 30. (Photo by Greg Baker/AFP Photo)

“Jimi Hendrix made it shriek. Buddy Holly made it swing. Stevie Ray Vaughn made it snarl. Some of the most legendary guitarists in music history have elicited unforgettable sounds from the Fender Stratocaster, the distinctive double-cutaway guitar born in a small Fullerton, Calif., workshop 60 years ago this month”. – Associated Press. Photo: A finished Fender Stratocaster is adjusted by Kenneth Maas in the Fender Custom Shop in Corona, Calif. on Tuesday, October 15, 2013. Leo Fender developed the instrument in a small workshop in Fullerton, Calif. six decades ago. (Photo by Matt York/AP Photo)

The tempestuous stellar nursery called the Carina Nebula, located 7,500 light-years away from Earth in the southern constellation Carina. (Photo by Reuters/NASA)

An alpaca is seen near the Inca citadel of Machu Picchu in Cusco December 2, 2014. Machu Picchu, a UNESCO World Heritage Site, is Peru's top tourist attraction, with the government limiting tourists to 2,500 per day due to safety reasons and concerns over the preservation of the ruins. (Photo by Enrique Castro-Mendivil/Reuters)