A collection of top photos from around the world:
People walk through a subway station during the worldwide “No Pants Subway Ride” event in Mexico City. Originally started in the U.S., the international event known as the “No Pants Subway Ride” was created by improvisation group “Improv Everywhere” and sees people taking train trips wearing no trousers, yet acting as normally as possible. | Getty Images
People gather at Place de la Nation, following a mass unity rally following thousands of people marching from Place de la Republique on route to Place de la Nation, following the recent terrorist attacks in Paris, France. | Getty Images
A man holds a pen aloft as people gather in Trafalgar Square to show their respect to victims of the terrorist attacks in Paris in London, England. | Rob Stothard/Getty Images
Green Bay Packers quarterback Aaron Rodgers celebrates after defeating the Dallas Cowboys 26-21 during the 2015 NFC Divisional Playoff game at Lambeau Field in Green Bay, Wisconsin. | Al Bello/Getty Images
Xu Xi and Zhang Jike of China in action against Stefan Fegrel and Daniel Habesohn of Austria during the Men’s Final of the 2015 ITTF World Team Cup at Al Nasr Sports Stadium in Dubai, United Arab Emirates. | Warren Little/Getty Images
Denver Broncos fan Shane Hergenreder, of Denver, stands on top of his RV as he holds a tail gate party outside of the venue before a 2015 AFC Divisional Playoff game at Sports Authority Field at Mile High in Denver, Colorado. | Justin Edmonds/Getty Images
Mini driver Vladimir Vasilyev and co-pilot Konstantin Zhiltsov, both from Russia, right, are trailed by Toyota driver Giniel de Villiers from South Africa and co-pilot Dirk Von Zitzewitz from Germany across the Uyuni salt flats during the eighth stage of the Dakar Rally 2015 between Uyuni, Bolivia, and Iquique, Chile. The race will finish on Jan. 17, passing through Bolivia and Chile before returning to Argentina where it started. | AP Photo/Felipe Dana
Fredison Costa, 37, of Piedade, Brazil, crosses the finish line first to win the 2015 Walt Disney World Marathon in Lake Buena Vista, Florida. The annual marathon takes runners on a 26.2-mile trek through all four Walt Disney World theme parks in Lake Buena Vista, Fla. | Preston Mack/Disney Parks via Getty Images