“The Challenge!” Young boy relishes in a game of tug of war before school. Photo location: Lake Titicaca, Peru. (Photo and caption by Paul Heyman/National Geographic Photo Contest)
Hikaru Cho believes that we should challenge our imaginations to create new work using traditional tools, not fancy computers and software. (Photo by Jim Marks/PA Wire)
German kickboxer Christine Theiss (L) hits challenger Olja Zerajic of Bosnia during their WKA middleweight title fight at Postpalast on March 2, 2012 in Munich, Germany. (Photo by Alexandra Beier/Bongarts/Getty Images)
A Maori warrior prepares to challenge Prince Charles during his welcome to Takanhanga Marae in Kaikoura, New Zealand November 23, 2019. (Photo by Tracey Nearmy/Reuters)
A physically challenged girl looks at her brother as she is kept in a basin to seek alms from people on the street in Kano, Nigeria December 30, 2015. The girl has suffered from her condition since birth. (Photo by Reuters/Stringer)
Participants race during the Red Bull Box Cart Race challenges in Bo Kaap, one of the iconic neighbourhoods in Cape Town, South Africa on November 6, 2022. (Photo by Esa Alexander/Reuters)
Princess Charlene poses after the arrival of the Riviera Water Bike Challenge in support of the Princess Charlene of Monaco Foundation, in Nice, France, June 4, 2017. (Photo by Eric Gaillard/Reuters)